Net Asset Value(s)

British Portfolio Trust PLC
18 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 17 March
2008:

1)  the capital net asset value per ordinary share was 158.77p.

2)  based on the number of shares held in treasury, the net asset value per
    ordinary share was 158.43p.




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





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