Net Asset Value(s)

NET ASSET VALUE

BLACKROCK INCOME AND GROWTH INVESTMENT TRUST PLC.

The unaudited net asset values for British Portfolio Trust plc. at close of
business 19 April 2012 was:

140.93p Capital only (undiluted)
140.16p Capital only (Diluted for treasury shares)
142.48p Including current year income (undiluted)
141.49p Including current year income (Diluted for treasury shares)

Notes:

1. Investments have been valued on a bid price basis.


2. Revenue items included in net asset value, with dividends payable deducted
on the ex-dividend date.