Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTERESTS IN SHARES                

1. IDENTITY OF THE ISSUER OR THE                 Alliance Trust PLC            
UNDERLYING ISSUER OF EXISTING SHARES TO                                        
WHICH VOTING RIGHTS ARE ATTACHED:                                              
                                                                               
2. REASON FOR NOTIFICATION:                                                    
                                                                               
a) an acquisition or disposal of voting          YES                           
rights                                                                         
                                                                               
b) an acquisition or disposal of                 n/a                           
qualifying financial instruments which may                                     
result in the acquisition of shares                                            
already issued to which voting rights are                                      
attached                                                                       
                                                                               
c) an acquisition or disposal of                 n/a                           
instruments with similar economic effect                                       
to qualifying financial instruments                                            
                                                                               
c) an event changing the breakdown of            n/a                           
voting rights                                                                  
                                                                               
d) other                                         n/a                           
                                                                               
3. FULL NAME OF PERSON(S) SUBJECT TO THE         D.C. Thomson & Company Limited
NOTIFICATION OBLIGATION:                                                       
                                                                               
4. FULL NAME OF SHAREHOLDER(S)                                                 
                                                                               
(if different from 3):                                                         
                                                                               
5. DATE OF THE TRANSACTION AND DATE ON           10 March 2010                 
WHICH THE THRESHOLD IS CROSSED OR REACHED:                                     
                                                                               
6. DATE ON WHICH ISSUER NOTIFIED:                10 March 2010                 
                                                                               
7. THRESHOLD(S) THAT IS/ARE CROSSED OR           6%                            
REACHED:                                                                       
                                                                               
8. NOTIFIED DETAILS:                                                           

A:    VOTING RIGHTS ATTACHED TO SHARES                                         
                                                                               
      CLASS/TYPE OF SHARES (if possible using the        2.5p Ordinary Shares  
      ISIN Code):                                                              
                                                         GB00B11V7W98          
                                                                               
      SITUATION PREVIOUS TO THE TRIGGERING                                     
      TRANSACTION:                                                             
                                                                               
      - NUMBER OF SHARES                                 43,000,000            
                                                                               
      - NUMBER OF VOTING RIGHTS                          43,000,000            
                                                                               
      RESULTING SITUATION AFTER THE TRIGGERING                                 
      TRANSACTION                                                              
                                                                               
      - NUMBER OF SHARES (DIRECT)                        37,000,000            
                                                                               
      - NUMBER OF VOTING RIGHTS (DIRECT)                 37,000,000            
                                                                               
      - NUMBER OF VOTING RIGHTS (INDIRECT)               n/a                   
                                                                               
      - % OF VOTING RIGHTS (DIRECT)                      5.547%                
                                                                               
      - % OF VOTING RIGHTS (INDIRECT)                    n/a                   
                                                                               
B     QUALIFYING FINANCIAL INSTRUMENTS                                         
                                                                               
      RESULTING SITUATION AFTER THE TRIGGERING TRANSACTION                     
                                                                               
      - TYPE OF FINANCIAL INSTRUMENT:                    n/a                   
                                                                               
      - EXPIRATION DATE:                                 n/a                   
                                                                               
      - EXERCISE/CONVERSION PERIOD/DATE:                 n/a                   
                                                                               
      - NUMBER OF VOTING RIGHTS THAT MAY BE              n/a                   
      ACQUIRED IF THE INSTRUMENT IS EXERCISED/                                 
      CONVERTED:                                                               
                                                                               
      - % OF VOTING RIGHTS:                              n/a                   
                                                                               
C     FINANCIAL INSTRUMENTS WITH SIMILAR ECONOMIC                              
      EFFECT TO QUALIFYING FINANCIAL INSTRUMENTS                               
                                                                               
      RESULTING SITUATION AFTER THE TRIGGERING                                 
      TRANSACTION                                                              
                                                                               
      - TYPE OF FINANCIAL INSTRUMENT:                    n/a                   
                                                                               
      - EXERCISE PRICE:                                                        
                                                                               
      - EXERCISE DATE:                                   n/a                   
                                                                               
      - EXERCISE/CONVERSION PERIOD:                      n/a                   
                                                                               
      - NUMBER OF VOTING RIGHTS INSTRUMENT REFERS        n/a                   
      TO:                                                                      
                                                                               
      - % OF VOTING RIGHTS:                              n/a                   
                                                                               
      NOMINAL                                                                  
                                                                               
      DELTA                                                                    
                                                                               
      TOTAL (A+B+C)                                                            
                                                                               
      - NUMBER OF VOTING RIGHTS:                         37,000,000            
                                                                               
      - % OF VOTING RIGHTS:                              5.547%                

9. CHAIN OF CONTROLLED UNDERTAKINGS THROUGH WHICH THE VOTING RIGHTS AND/OR THE 
FINANCIAL INSTRUMENTS ARE EFFECTIVELY HELD, IF APPLICABLE:                     
                                                                               
N/A                                                                            
                                                                               

PROXY VOTING:                                                                  
                                                                               
10. NAME OF THE PROXY HOLDER:                N/A                               
                                                                               
11. NUMBER OF VOTING RIGHTS PROXY            N/A                               
HOLDER WILL CEASE TO HOLD:                                                     
                                                                               
12. DATE ON WHICH PROXY HOLDER WILL          N/A                               
CEASE TO HOLD VOTING RIGHTS:                                                   

13. ADDITIONAL INFORMATION:            Notification using the total voting     
                                       rights figures of 667,059,760.          
                                                                               
                                       27,000,000 held by D.C. Thomson & Co    
                                       Ltd.                                    
                                                                               
                                       10,000,000 held by John Leng & Co Ltd (a
                                       wholly owned subsidiary of D.C. Thomson 
                                       & Co Ltd)                               
                                                                               
14. CONTACT NAME:                      Irene Douglas                           
                                                                               
15. CONTACT TELEPHONE NUMBER:          01382 575732                            
                                                                               
16. DATE OF NOTIFICATION:              10 March 2010