Annual Information Update

UNITED UTILITIES GROUP PLC                                                      
                                                                                
ANNUAL INFORMATION UPDATE 3 JULY 2009 - 2 JULY 2010                                                                            
                                                                                
Date of     Description of Document               Place of     Place where copy 
publication                                       filing       can be obtained  
                                                                                
03.07.09    Annual Information Update             UK Listing   LSE's and        
                                                  Authority    company's website
                                                                                
03.07.09    United Utilities Water PLC - Accounts UK Listing   LSE's and        
            available at Document viewing         Authority    company's website
            facility                                                            
                                                                                
07.07.09    Form 88(2) reflecting the allotment   Companies    Companies House  
            of shares under the Matching Share    House                         
            Plan                                                                
                                                                                
15.07.09    United Utilities PLC - Accounts       UK Listing   LSE's and        
            available at Document viewing         Authority    company's website
            facility                                                            
                                                                                
20.07.09    Director/PDMR share interests - SIP   UK Listing   LSE's and        
                                                  Authority    company's website
                                                                                
23.07.09    Response to the Draft Determination   UK Listing   LSE's and        
                                                  Authority    company's website
                                                                                
24.07.09    AGM and Trading Statement             UK Listing   LSE's and        
                                                  Authority    company's website
                                                                                
27.07.09    AGM - Results of Poll                 UK Listing   LSE's and        
                                                  Authority    company's website
                                                                                
27.07.09    AGM - Resolutions passed              UK Listing   LSE's and        
                                                  Authority    company's website
                                                                                
30.07.09    AGM - Resolutions passed              Companies    Companies House  
                                                  House                         
                                                                                
01.08.09    Total voting rights                   UK Listing   LSE's and        
                                                  Authority    company's website
                                                                                
04.08.09    Director/PDMR share interests -       UK Listing   LSE's and        
            Matching Share Plan, Performance      Authority    company's website
            Share Plan, Deferred Share Plan,                                    
            Retention Awards and SIP - Dividend                                 
            Reinvestment                                                        
                                                                                
18.08.09    Director/PDMR share interests - SIP   UK Listing   LSE's and        
                                                  Authority    company's website
                                                                                
18.09.09    Director/PDMR share interests - SIP   UK Listing   LSE's and        
                                                  Authority    company's website
                                                                                
23.09.09    Trading Statement                     UK Listing   LSE's and        
                                                  Authority    company's website
                                                                                
07.10.09    Forms CH01 changing directors'        Companies    Companies House  
            addresses to service addresses        House                         
                                                                                
08.10.09    Forms CH01 changing directors'        Companies    Companies House  
            addresses to service addresses        House                         
                                                                                
12.10.09    Forms AD02 and AD03 Changing SAIL     Companies    Companies House  
            address                               House                         
                                                                                
13.10.09    Forms CH01 changing directors'        Companies    Companies House  
            addresses to service addresses        House                         
                                                                                
20.10.09    Director/PDMR share interests - SIP   UK Listing   LSE's and        
                                                  Authority    company's website
                                                                                
03.11.09    Holding in company - Pictet 4.995%    UK Listing   LSE's and        
                                                  Authority    company's website
                                                                                
05.11.09    Holding in company - Legal & General  UK Listing   LSE's and        
            3.97%                                 Authority    company's website
                                                                                
12.11.09    Disposal of Interest in Manila Water  UK Listing   LSE's and        
            Company                               Authority    company's website
                                                                                
16.11.09    Disposal of Interest in Northern Gas  UK Listing   LSE's and        
            Networks Holdings Limited             Authority    company's website
                                                                                
18.11.09    Director/PDMR share interests - SIP   UK Listing   LSE's and        
                                                  Authority    company's website
                                                                                
25.11.09    Half year 09/10 Announcement          UK Listing   LSE's and        
                                                  Authority    company's website
                                                                                
26.11.09    Announcement of Ofwat Final           UK Listing   LSE's and        
            Determination                         Authority    company's website
                                                                                
10.12.09    Tim Weller, Chief Financial Officer,  UK Listing   LSE's and        
            to leave United Utilities in May 2010 Authority    company's website
                                                                                
18.12.09    Director/PDMR share interests - SIP   UK Listing   LSE's and        
                                                  Authority    company's website
                                                                                
29.12.09    Holding in company - BlackRock, Inc   UK Listing   LSE's and        
            5.21%                                 Authority    company's website
                                                                                
29.12.09    Holding in company - BlackRock, Inc   UK Listing   LSE's and        
            4.99%                                 Authority    company's website
                                                                                
13.01.10    Key Dates                             UK Listing   LSE's and        
                                                  Authority    company's website
                                                                                
15.01.10    Holding in company - BlackRock, Inc   UK Listing   LSE's and        
            5.00%                                 Authority    company's website
                                                                                
19.01.10    Director/PDMR share interests - SIP   UK Listing   LSE's and        
                                                  Authority    company's website
                                                                                
21.01.10    Interim Management Statement and      UK Listing   LSE's and        
            Final Determination                   Authority    company's website
                                                                                
04.02.10    Director/PDMR share interests -       UK Listing   LSE's and        
            Dividend Reinvestment within share    Authority    company's website
            plans                                                               
                                                                                
05.02.10    Holding in company - BlackRock, Inc   UK Listing   LSE's and        
            4.98%                                 Authority    company's website
                                                                                
09.02.10    Holding in company - BlackRock, Inc   UK Listing   LSE's and        
            5.13%                                 Authority    company's website
                                                                                
16.02.10    Publication of Supplementary Offering UK Listing   LSE's and        
            Circular                              Authority    company's website
                                                                                
18.02.10    Director/PDMR share interests - SIP   UK Listing   LSE's and        
                                                  Authority    company's website
                                                                                
18.03.10    Director/PDMR share interests - SIP   UK Listing   LSE's and        
                                                  Authority    company's website
                                                                                
25.03.10    Pre-Close Trading Statement           UK Listing   LSE's and        
                                                  Authority    company's website
                                                                                
06.04.10    Director/PDMR share interests - SIP   UK Listing   LSE's and        
                                                  Authority    company's website
                                                                                
10.05.10    Disposal of Australian Businesses     UK Listing   LSE's and        
                                                  Authority    company's website
                                                                                
13.05.10    Annual Return                         Companies    Companies House  
                                                  House                         
                                                                                
18.05.10    Director/PDMR share interests - SIP   UK Listing   LSE's and        
                                                  Authority    company's website
                                                                                
18.05.10    Appointment of new Chief Financial    UK Listing   LSE's and        
            Officer - Russ Houlden                Authority    company's website
                                                                                
21.05.10    Announcement of Final Results for     UK Listing   LSE's and        
            year ending 31 March 2010             Authority    company's website
                                                                                
24.05.10    Form TM01 - resignation of Tim Weller Companies    Companies House  
                                                  House                         
                                                                                
04.06.10    Paul Heiden appointed to Meggitt PLC  UK Listing   LSE's and        
            and London Stock Exchange Group PLC   Authority    company's website
            as non-executive director                                           
                                                                                
14.06.10    UU. - Agreement to sell UK/European   UK Listing   LSE's and        
            non-reg interests                     Authority    company's website
                                                                                
16.06.10    Charlie Cornish, MD Utility Solutions UK Listing   LSE's and        
            to leave United Utilities             Authority    company's website
                                                                                
17.06.10    Holding in Company - Tradewinds -     UK Listing   LSE's and        
            3.83%                                 Authority    company's website
                                                                                
18.06.10    Director/PDMR share interests - SIP   UK Listing   LSE's and        
                                                  Authority    company's website
                                                                                
18.06.10    Holding in Company - Tradewinds -     UK Listing   LSE's and        
            2.55%                                 Authority    company's website
                                                                                
18.06.10    Accounts available at Document        UK Listing   LSE's and        
            viewing facility and Company's        Authority    company's website
            website                                                             
                                                                                
22.06.10    Director/PDMR share interests - P N   UK Listing   LSE's and        
            Green - Matching Share Plan Exercise  Authority    company's website
                                                                                
22.06.10    Director/PDMR share interests - C     UK Listing   LSE's and        
            Cornish - Matching Share Plan and     Authority    company's website
            long term incentive scheme exercise                                 
                                                                                
22.06.10    Director/PDMR share interests - G     UK Listing   LSE's and        
            Kenyon - Matching Share Plan Exercise Authority    company's website
                                                                                
30.06.10    United Utilities Water PLC - Accounts UK Listing   LSE's and        
            available at Document viewing         Authority    company's website
            facility and Company's website                                      
                                                                                
30.06.10    Director/PDMR share interests -       UK Listing   LSE's and        
            Deferred Share Award Plan - Steven    Authority    company's website
            Fraser and Matthew Wright                                           
                                                                                
30.06.10    CH01 - Change of address - Catherine  Companies    Companies House  
            Bell                                  House                         
                                                                                
02.07.10    Annual Information Update             UK Listing   LSE's and        
                                                  Authority    company's website