Net Asset Value(s)

British Portfolio Trust PLC
31 August 2005

British Portfolio Trust PLC

British Portfolio Trust PLC announces that at close of business on 30 August
2005:

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 155.67p; and

2)      based on the market value of the company's fixed interest rate swap
contracts, the capital net asset value per ordinary share was 155.24p; and

3)     based on the number of shares held in treasury, the net asset value per
ordinary share was 155.61p.



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



Enquiries:

Peter Ingram

Tel: [phone]

31 August 2005





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