NET ASSET VALUE

BLACKROCK WORLD MINING TRUST PLC

The unaudited net asset values for BlackRock World Mining Trust plc at close of
business on 19 April 2017 were:

385.17p  Capital only (undiluted)
391.20p  Including current year income (undiluted) XD

Notes:

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

2.        Following the buyback of 112,008 ordinary shares on 25 April 2016,
the Company has 176,455,242 ordinary shares in issue, excluding 16,556,600
which are held in treasury.

3.        For the latest daily net asset value, previous month end performance
statistics, asset allocation and ten largest holdings of the BlackRock managed
Investment Trusts; see BLRKINDEX on Reuters or page 8800 on ICB (Topic 3).

4.        Investments have been valued on a bid price basis

5.        The recapitalisation transaction of Banro Corporation ("Banro") was
completed on 19 April 2017. Based on the market price of common shares of Banro
as at close of business on 19 April 2017, an upward revaluation of
approximately £4.4 million has been included in the cum income net asset value
('NAV') of the Company (approximately 2.5p (circa 0.64%).