Annual Information Update

Slough Estates plc                               

                           Annual Information Update                           

In accordance with Prospectus Rule 5.2, Slough Estates plc announces that the
following regulatory announcements and statutory filings have been made via the
Regulatory News Service and/or filed at Companies House, as applicable, between
20 April 2006 and 22 March 2007.

The information referred to in this update was up to date at the time the
information was published but some information may now be out of date.

The announcements listed below have been published via a Regulatory Information
Service and can be found on www.londonstockeschange.com.

APRIL                                                                          
                                                                               
21/04/06      Additional Listing                                               
                                                                               
21/04/06      Result of Conversion of Prefs                                    
                                                                               
24/04/06      Acquisition                                                      
                                                                               
26/04/06      Annual Information Update                                        
                                                                               
MAY                                                                            
                                                                               
08/05/06      Holdings in Company                                              
                                                                               
11/05/06      Director/PDMR Shareholding                                       
                                                                               
11/05/06      Holdings in Company                                              
                                                                               
11/05/06      Director/PDMR Shareholding                                       
                                                                               
12/05/06      Circ re Compulsory Conversion                                    
                                                                               
15/05/06      Director/PDMR Shareholding                                       
                                                                               
16/05/06      AGM Statement                                                    
                                                                               
16/05/06      AGM Statement - Proxy Votes                                      
                                                                               
18/05/06      Director/PDMR Shareholding                                       
                                                                               
18/05/06      Director/PDMR Shareholding                                       
                                                                               
18/05/06      Holdings in Company                                              
                                                                               
19/05/06      Directorate Change                                               
                                                                               
25/05/06      Director/PDMR Shareholding                                       
                                                                               
25/05/06      Director/PDMR Shareholding                                       
                                                                               
25/05/06      Director/PDMR Shareholding                                       
                                                                               
25/05/06      Director/PDMR Shareholding                                       
                                                                               
25/05/06      Transaction in own shares                                        
                                                                               
JUNE                                                                           
                                                                               
02/06/06      Directorate Change                                               
                                                                               
02/06/06      Transaction in own shares                                        
                                                                               
07/06/06      Director/PDMR Shareholding                                       
                                                                               
14/06/06      Director/PDMR Shareholding                                       
                                                                               
15/06/06      New tenant on Slough Trading Estate                              
                                                                               
15/06/06      Director/PDMR Shareholding                                       
                                                                               
15/06/06      Director/PDMR Shareholding                                       
                                                                               
19/06/06      Transaction in own shares                                        
                                                                               
19/06/06      New lease                                                        
                                                                               
19/06/06      New leases                                                       
                                                                               
20/06/06      Director/PDMR Shareholding                                       
                                                                               
20/06/06      Director/PDMR Shareholding                                       
                                                                               
22/06/06      Director/PDMR Shareholding                                       
                                                                               
27/06/06      Director Declaration                                             
                                                                               
29/06/06      Director/PDMR Shareholding                                       
                                                                               
JULY                                                                           
                                                                               
07/07/06      Slough Estates delivers another million sq ft in Europe          
                                                                               
13/07/06      Blocklisting Interim Review                                      
                                                                               
13/07/06      Blocklisting Interim Review                                      
                                                                               
13/07/06      Blocklisting Interim Review                                      
                                                                               
13/07/06      Blocklisting Interim Review                                      
                                                                               
13/07/06      Blocklisting Interim Review                                      
                                                                               
13/07/06      Blocklisting Interim Review                                      
                                                                               
17/07/06      Disposal                                                         
                                                                               
AUGUST                                                                         
                                                                               
01/08/06      Disposal                                                         
                                                                               
23/06/06      Interim Results                                                  
                                                                               
24/06/06      Director/PDMR Shareholding                                       
                                                                               
SEPTEMBER                                                                      
                                                                               
05/09/06      Director/PDMR Shareholding                                       
                                                                               
05/09/06      Director/PDMR Shareholding                                       
                                                                               
12/09/06      Director/PDMR Shareholding                                       
                                                                               
18/09/06      Directorate Change                                               
                                                                               
21/09/06      Slough Estates announces 66,000 sq ft biotech letting            
                                                                               
OCTOBER                                                                        
                                                                               
02/10/06      Director PDMR Shareholding                                       
                                                                               
02/10/06      Director/PDMR Shareholding                                       
                                                                               
17/10/06      Director/PDMR Shareholding                                       
                                                                               
17/10/06      Director/PDMR Shareholding                                       
                                                                               
20/10/06      Acquisition(s)                                                   
                                                                               
23/10/06      Director/PDMR Shareholding                                       
                                                                               
23/10/06      Director/PDMR Shareholding                                       
                                                                               
31/10/06      Acquisition(s)                                                   
                                                                               
NOVEMBER                                                                       
                                                                               
06/11/06      Holding(s) in a Company                                          
                                                                               
07/11/06      Director/PDMR Shareholding                                       
                                                                               
09/11/06      Acquisition/Disposal                                             
                                                                               
09/11/06      European Sale and Leaseback Agreement with Antalis               
                                                                               
16/11/06      Trading Statement                                                
                                                                               
17/11/06      Director/PDMR Shareholding                                       
                                                                               
17/11/06      Director/PDMR Shareholding                                       
                                                                               
17/11/06      Director/PDMR Shareholding                                       
                                                                               
20/11/06      Director/PDMR Shareholding                                       
                                                                               
20/11/06      Notice of EGM                                                    
                                                                               
21/11/06      Director/PRMR Shareholding                                       
                                                                               
21/11/06      Director/PDMR Shareholding                                       
                                                                               
21/11/06      Director/PDMR Shareholding                                       
                                                                               
29/11/06      Director/PDMR Shareholding                                       
                                                                               
DECEMBER                                                                       
                                                                               
14/12/06      EGM Statement                                                    
                                                                               
15/12/06      Directorate Change                                               
                                                                               
20/12/06      Director/PDMR Shareholding                                       
                                                                               
21/12/06      Update                                                           
                                                                               
21/12/06      Director/PDMR Shareholding                                       
                                                                               
29/12/06      Total Voting Rights                                              
                                                                               
JANUARY                                                                        
                                                                               
03/01/07      Director/PDMR Shareholding                                       
                                                                               
10/01/07      Blocklisting - Interim Review                                    
                                                                               
10/01/07      Blocklisting - Interim Review                                    
                                                                               
10/01/07      Blocklisting - Interim Review                                    
                                                                               
10/01/07      Blocklisting - Interim Review                                    
                                                                               
10/01/07      Blocklisting - Interim review                                    
                                                                               
10/01/07      Blocklisting - Interim Review                                    
                                                                               
15/01/07      Acquisition(s)                                                   
                                                                               
19/01/07      Total Voting Rights                                              
                                                                               
19/01/07      Sale of Centennial Business Park                                 
                                                                               
FEBRUARY                                                                       
                                                                               
12/02/07      Notice of Results                                                
                                                                               
16/02/07      Holding(s) in Company                                            
                                                                               
22/02/07      Disposal                                                         
                                                                               
26/02/07      Holding(s) in Company                                            
                                                                               
MARCH                                                                          
                                                                               
08/03/07      Final results                                                    
                                                                               

The documents listed below were filed with Companies House. Copies of these
documents can be obtained from Companies House or through Companies House
Direct at www.direct.companieshouse.gov.uk.

APRIL                                                                          
                                                                               
MAY                                                                            
                                                                               
12/05/06      Return of Allotments - Form 88(2)                                
                                                                               
17/05/06      Return of Allotments - Form 88(2)                                
                                                                               
17/05/06      Return of Allotments - Form 88(2)                                
                                                                               
19/05/06      Directors change of particulars - Form 288c                      
                                                                               
19/05/06      Director Resigned - Form 288b                                    
                                                                               
23/05/06      Group of Companies Accounts                                      
                                                                               
JUNE                                                                           
                                                                               
01/06/06      Resolution re conferring authority                               
                                                                               
05/06/06      Resolution re 10% shares at 25p each                             
                                                                               
07/06/06      Return of Allotments - Form 88(2)                                
                                                                               
09/06/06      Return of Allotments - Form 88(2)                                
                                                                               
16/06/06      Return of Allotments - Form 88(2)                                
                                                                               
23/06/06      Return of Allotments - Form 88(2)                                
                                                                               
28/06/06      Notice of assignment of name or new name to shares - Form 128(4) 
                                                                               
JULY                                                                           
                                                                               
11/07/06      Annual Return - Form 363a                                        
                                                                               
11/07/06      Return of Allotments - Form 88(2)                                
                                                                               
12/07/06      Director Appointed - Form 288a                                   
                                                                               
17/07/06      Return of Allotments - Form 88(2) times 14                       
                                                                               
19/07/06      Return of Allotments - Form 88(2)                                
                                                                               
25/07/06      Return of Allotments - Form 88(2)                                
                                                                               
AUGUST                                                                         
                                                                               
16/08/06      Return of Allotments - Form 88(2)                                
                                                                               
31/08/06      Return of Allotments - Form 88(2) times 3                        
                                                                               
SEPTEMBER                                                                      
                                                                               
08/09/06      Return of Allotments - Form 88(2)                                
                                                                               
15/09/06      Declaration of Satisfaction of Mortgage / Charge - Form 403(a)   
                                                                               
26/09/06      Return of Allotments - Form 88(2)                                
                                                                               
OCTOBER                                                                        
                                                                               
02/10/06      Return of Allotments - Form 88(2)                                
                                                                               
02/10/06      Director Resigned - Form 288b                                    
                                                                               
10/10/06      Return of Allotments - Form 88(2)                                
                                                                               
26/10/06      Return of Allotments - Form 88(2) times 6                        
                                                                               
NOVEMBER                                                                       
                                                                               
22/11/06      Return of Allotments - Form 88(2) times 7                        
                                                                               
23/11/06      Directors changes of particulars - Form 288c                     
                                                                               
DECEMBER                                                                       
                                                                               
22/12/06      Memorandum and Articles of Association                           
                                                                               
22/12/06      Resolution to alter Articles of Association                      
                                                                               
JANUARY                                                                        
                                                                               
11/01/07      Director Appointed - Form 288a                                   
                                                                               
25/01/07      Director Appointed - Form 288a                                   
                                                                               
FEBRUARY                                                                       
                                                                               
01/02/07      Director Resigned - Form 288b                                    
                                                                               
23/02/07      Return of Allotments - Form 88(2) times 8                        
                                                                               
MARCH                                                                          
                                                                               
20/03/07      Return of allotments - Form 88(2)