Portfolio Update

BLACKROCK WORLD MINING TRUST plc
All information is at 31 March 2013 and unaudited.

Performance at month end with net income reinvested
                                 One    Three      One    Three     Five
                               Month   Months     Year    Years    Years
Net asset value (undiluted)    -6.7%    -9.0%   -16.9%   -12.1%   -14.7%
Net asset value (diluted)      -6.7%    -9.0%   -16.9%   -12.1%   -13.5%
Share price                    -7.2%    -8.4%   -19.1%   -10.0%   -13.4%
HSBC Global Mining Index*      -5.8%    -6.7%   -10.8%   -18.8%    -5.3%
*Total return

Sources: BlackRock, HSBC Global Mining Index, DataStream

At month end
Net asset value           Including Income            Capital Only
Undiluted/diluted:                 612.16p*                606.69p
*Includes net revenue of 5.47p

Share price:                       524.00p
Discount to NAV**:                   14.4%
Total assets:                   £1,205.14m
Net yield***:                         4.0%
Gearing:                              11.0%

Ordinary shares in issue:          177,287,242
Ordinary shares held in Treasury:   15,724,600

** Discount to NAV including Income.
*** Based on final dividend of 14.00p and an interim dividend of 7.00p per
share in respect of the year ended 31 December 2012.

Sector                   % Total    Country Analysis          % Total
                          Assets                               Assets

Diversified                 40.2    Global                       48.0
Base Metals                 23.7    Latin America                18.9
Industrial Minerals         16.1    Other Africa                 16.4
Gold                         8.9    Australasia                   6.2
Silver & Diamonds            8.7    South Africa                  5.4
Platinum                     2.6    Democratic Republic of Congo  2.0
Energy Minerals              0.3    USA                           1.3
Net current liabilities     (0.5)   Europe                        1.1
                           -----    Canada                        0.7
                           100.0    Indonesia                     0.3
                           =====    Mongolia                      0.2
                                    Net current liabilities      (0.5)
                                                                -----
                                                                100.0
                                                                =====

Ten Largest Investments                       % Total
                                               Assets

Company
Rio Tinto                                        10.8
BHP Billiton                                      9.9
Glencore International                            6.2
London Mining Marampa Contract                    6.0
Freeport McMoRan                                  4.7
First Quantum Minerals                            4.2
Xstrata                                           4.1
Industrias Penoles                                3.7
Inmet Mining                                      3.6
Vale                                              3.4
 
Commenting on the markets, Evy Hambro, representing the Investment Manager 
noted:

Performance
While both the US and China continued to deliver positive economic data, the
markets attention reverted back to Europe following the announcement that the
Cypriot government was proposing a levy on bank deposits.  This caused concern
in markets as it highlighted the wider implications of this action for other
troubled countries in Europe, reminding investors that cash is not a risk-free
asset. 

Against a backdrop where auto sales, property construction and sales have been
rising across China, steel production has been showing strong year-on-year
growth and the US housing market is showing signs of a recovery, commodity
prices have been mixed.  Both base metals and bulk commodities declined with
zinc and lead falling by 8.9% and 7.9% respectively and iron ore prices falling
by 9.5% to $137.5/t (CLSA MB China spot price).  Precious metals, gold and
palladium, outperformed the majority of base metals and bulk commodities for
the first monthly period in 2013. 

Much of the muted commodity price action has been a consequence of supply
meeting demand; however recent developments in Chile have highlighted the
opportunity for markets to be less balanced in the near term.  Codelco, the
Chilean state owned miner that produces ~10% of global copper supply, announced
that union workers would be embarking on a 24-hour strike.  This has happened
at the same time as workers are striking at ports across the country, estimated
to be holding back the export of around 60% of the country's total production
(Macquarie, April 2013).  The actions serve to remind us how supply disruptions
in key producing regions can quickly adjust the outlook for commodity prices.

Towards the end of the period, copper producer First Quantum finalised its
acquisition of Inmet, another mid-tier copper producer.  Inmet's key
development asset, Cobra Panama, will add to the company's highly attractive
growth profile.  Based on current reserves, should the company successfully
bring these operations into production, this is expected to deliver growth of
over three times its 2012 production by 2017.

Strategy/Outlook
The mining sector and other cyclical areas have struggled over the last two
years as the market has downgraded global growth expectations.  If growth,
sentiment and risk appetite continue to improve in 2013 then the mining sector
could well enjoy renewed momentum.

In the short to medium term, commodity prices are likely to remain elevated but
range-bound as supply and demand have come closer into balance.  We expect
greater tightness to return for certain commodities, but for now mining
companies need to be focused on capital discipline, operational efficiency and
growing margins through cost control.  In such an environment, well-managed
mining businesses should be able to generate significant free cash flow, in a
strong position to return cash to shareholders and should see their share
prices rewarded as a result.  In the Company, we are looking to identify the
winners and the stock specific stories that have been neglected in the risk-off
markets of the last two years.

18 April 2013

ENDS

Latest information is available by typing www.brwmplc.co.uk on the internet,
"BLRKINDEX" on Reuters, "BLRK" on Bloomberg or "8800" on Topic 3 (ICV
terminal).  Neither the contents of the Manager's website nor the contents of
any website accessible from hyperlinks on the Manager's website (or any other
website) is incorporated into, or forms part of, this announcement.