Net Asset Value(s)

NET ASSET VALUE

BLACKROCK WORLD MINING TRUST PLC

The unaudited net asset values for BlackRock World Mining Trust plc at close
of business on 29 May 2015 were:

341.67p Capital only (undiluted)
350.12p Including current year income (undiluted)

Notes:

1. As at 28 May 2015, the Trust held the 10% senior secured notes issued by
Banro Corporation at a 10% discount to their last traded price. This discount
reflected low trading activity in these listed notes. Following increased
liquidity in the notes and a recommendation from BlackRock's Pricing
Committee, the discount on the 10% senior secured notes has been reduced to
nil. This gives a valuation for the Trust's investment in Banro's 10% senior
secured notes of £7.87m (previous valuation £6.66m), a cumulative impact to
the NAV of approximately 0.68 pence. As the senior secured notes continue to
trade at a discount to par value, the discount of 15% on the valuation of
gold-linked preference shares issued by Banro Corporation remains unchanged,
which reflects their unquoted status and a recommendation from BlackRock's
Pricing Committee. As at 29 May 2015, the Trust's total exposure to Banro
Corporation stands at 3.75% of the NAV, of which the gold-linked preference
shares represent 2.44% and the senior secured notes represent 1.31%.

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

3. The undiluted net asset value per share has been calculated on 177,287,242
ordinary shares excluding 15,724,600 held in treasury.

4. 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).

5. Investments have been valued on a bid price basis.