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 11 May 2015 were:

144.96p Capital Only: Debt at par
139.99p Capital Only: Debt at Fair Value
147.36p Including current year revenue: Debt at par
142.38p 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.