Net Asset Value(s)

British Portfolio Trust PLC
20 September 2005


British Portfolio Trust PLC

British Portfolio Trust PLC announces that at close of business on 19 September
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 161.77p; 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 161.30p; and
     
3)   based on the number of shares held in treasury, the net asset value per
     ordinary share was 161.67p.

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


Enquiries:
Peter Ingram
Tel: [phone]
20 September 2005


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