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 2 March 2015 were:

352.82p Capital only (undiluted)
368.00p including current year income (undiluted)

Notes:

1. Banro Corporation announced on 27 February 2015 (after UK market close)
details of a US$100 million financing which included the forward sale of 44,496
ounces of gold from their Twangiza operation deliverable over the next three
years and a life-of mine gold streaming transaction relating to their Namoya
mine. Banro have advised that the use of proceeds from this financing will
include the payment of the upcoming interest due on the company's 10% senior
secured notes and payment of the accrued dividends on the company's gold-linked
preference shares. For further details please refer to Banro Corporation's
website (www.banro.com).

As at 27 February, the Trust held the gold-linked preference shares at a 30%
discount to the implied gold price used in their valuation and the 10% senior
secured notes at a 25% discount to their last traded price (please refer to the
10 December 2014 NAV announcement, released on 11 December 2014, for further
details). Following Banro's news release and on a recommendation from
BlackRock's Pricing Committee, the Board has concluded that it is appropriate
to reduce the discount on the gold-linked preference shares to 15% and the
discount on the 10% senior secured notes to 10%. This gives a valuation for the
Trust's investment in Banro's gold-linked preference shares and 10% senior
secured notes of £14.09m and £7.34m respectively (previous valuation £11.55m
and £6.08m), a cumulative impact to the NAV of approximately 2.14 pence. As at
2 March 2015, the Trust's total exposure to Banro Corporation now stands at
3.3% of the NAV, of which the gold-linked preference shares represent 2.2% and
the senior secured notes represent 1.1%.

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.