Net Asset Value(s)

British Portfolio Trust PLC
17 March 2008


British Portfolio Trust PLC

As recommended by the AIC, financial assets are now valued on a bid price basis
in accordance with revised UK accounting standards.

British Portfolio Trust PLC announces that at close of business on 14 March
2008:
     
1)   the capital net asset value per ordinary share was 164.36p.

2)   based on the number of shares held in treasury, the net asset value per
     ordinary share was 164.19p.


Enquiries:
Peter Ingram
Tel: [phone]
17 March 2008


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