Net Asset Value(s)

British Portfolio Trust PLC
19 January 2007






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 18 January
2007:

1)      Excluding any profit or loss on the mark to market value of the
company's fixed interest swap contract, the capital net asset value per ordinary
share was 186.15p.

2)      based on the market value of the company's fixed interest rate swap
contracts, the capital net asset value per ordinary share was 186.14 and

3)     based on the number of shares held in treasury, the net asset value per
ordinary share was 185.64p.



The market value of the company's fixed interest rate swap contracts is updated
monthly.



Enquiries:

Peter Ingram

Tel: [phone]

19 January 2007






                      This information is provided by RNS
            The company news service from the London Stock Exchange