Net Asset Value(s)

Invesco Asset Management Limited                        

HEADLINE: Net Asset Values

It is announced that at the close of business on 20 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   1219.67        -   1250.49       -
- see Note 3                                                                   
                              Debt at Fair   1199.21            1230.03        
                                     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.

21 May 2008