Net Asset Value(s)

NET ASSET VALUE

BLACKROCK WORLD MINING TRUST PLC

The unaudited net asset value for BlackRock World Mining Trust plc at close of
business on 15 January 2009 was:

297.32p Capital only (undiluted)

301.64p Including current year income (undiluted)

297.32p Capital only (diluted for warrants)

301.64p Including current year income (diluted for warrants)

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 BlackRock World Mining Trust plc diluted NAV has been calculated based
on 8,947,605 warrants in issue.

4. 200,000 ordinary shares were purchased on 19 August 2008, bringing the total
amount of ordinary shares held in Treasury to 14,692,800.

5. 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).

6. New shares arising from 20,867,250 warrants exercised on 29 February 2008
commenced trading on 14 March 2008.