Net Asset Value(s)

Invesco Asset Management Limited                        

HEADLINE: Net Asset Values

It is announced that at the close of business on 28 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   1207.80       -   1222.76       -
- see Note 2                                                                   
                               Debt at Fair   1189.01           1203.97        
                                      Value                                    
                                                                               

All the above NAVs have been calculated using the fair value prices for the
underlying investments.

All the above Companies are members of the Association of Investment Companies
(AIC). The AIC monthly NAV information will be moving to a Cum Income NAV basis
- ie Capital NAV plus undistributed net revenue for the current period. To be
in alignment with the AIC, all of the companies shown above will publish both
Capital and Cum Income NAVs commencing from today's date.

Note:

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

29 May 2008