Net Asset Value(s)

BLACKROCK INCOME AND GROWTH INVESTMENT TRUST PLC.

The unaudited net asset values for British Portfolio Trust plc. at close of
business 20 April 2012 was:

141.87p Capital only (undiluted)
141.10p Capital only (Diluted for treasury shares)
143.42p Including current year income (undiluted)
142.43p 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.