Net Asset Value(s)

NET ASSET VALUE

BLACKROCK INCOME STRATEGIES TRUST PLC

The unaudited net asset values for the ordinary shares of BlackRock Income
Strategies Trust plc at close of business on 13 May 2015 were:

143.74p Capital Only: Debt at par
139.01p Capital Only: Debt at Fair Value
146.20p Including current year revenue: Debt at par
141.47p Including current year revenue: Debt at Fair Value

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.

3. The unaudited NAV above has been calculated on the basis of 288,412,282
Ordinary Shares in issue.