Net Asset Value(s)

British Portfolio Trust PLC
25 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 22 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 172.33p

2)      based on the market value of the company's fixed interest rate swap
contracts, the capital net asset value per ordinary share was 172.19p; and

3)     based on the number of shares held in treasury, the net asset value per
ordinary share was 172.18p.

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

Enquiries:
Peter Ingram
Tel: [phone]
25 September 2006



  

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