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 19 May 2015 were:

145.24p Capital Only: Debt at par
140.38p Capital Only: Debt at Fair Value
147.90p Including current year revenue: Debt at par
143.04p 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.