Net Asset Value(s)

Invesco Asset Management Limited                        

HEADLINE: Net Asset Values

It is announced that at the close of business on 1 May 2008 the unaudited net
asset values per share (AIC basis) of the following investment trust companies
managed by Invesco Asset Management Limited are:-

                                            NAVs with Debt at Par & Fair Value 
                                                                               
Company                                    Undiluted  Diluted Undiluted Diluted
                                                                               
                                             Capital  Capital       Cum     Cum
                                                                               
                                                                 Income  Income
                                                                               
                                             (pence)  (pence)   (pence) (pence)
                                                                               
                                                                   
Keystone Investment Trust plc  Debt at Par   1197.91        -   1224.20       -
- see Note 3                                                                   
                              Debt at Fair   1173.62            1199.91        
                                     Value                                     
                                                                               
All the above NAVs have been calculated using the fair value (bid) prices for
the underlying investments.

Note:

3. The NAVs above include a provision for performance fee where applicable.