Net Asset Value(s)

British Portfolio Trust PLC
01 November 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 31 October
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 180.64p based on the market value of the company's fixed interest
     rate swap contracts, the capital net asset value per ordinary share was 
     180.57p and

2)   based on the number of shares held in treasury, the net asset value per 
     ordinary share was 180.27p.

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

Enquiries:
Peter Ingram
Tel: [phone]
1 November 2006




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