Net Asset Value(s)

British Portfolio Trust PLC
28 September 2006

British Portfolio Trust PLC



As recommended by the AITC, 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 27 September
2006:

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 175.08p

2)      based on the market value of the company's fixed interest rate swap
contracts, the capital net asset value per ordinary share was 174.95p; and

3)     based on the number of shares held in treasury, the net asset value per
ordinary share was 174.75p.



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



Enquiries:

Peter Ingram

Tel: [phone]

28 September 2006







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