Portfolio Update

BLACKROCK WORLD MINING TRUST plc
All information is at 31 March 2010 and unaudited.

Performance at month end with net income reinvested
                                    One     Three       One     Three      Five
                                  Month    Months      Year     Years     Years
                                                                               
Net asset value* (undiluted)      11.0%     12.0%     95.4%     33.6%    195.2%          
Net asset value* (diluted)        11.0%     12.0%     95.4%     36.9%    199.9%          
Share price*                      14.1%     13.8%     90.3%     27.4%    192.7%          
HSBC Global Mining Index          10.7%     11.0%     86.9%     63.0%    225.5%          

Sources: BlackRock, HSBC Global Mining Index, Datastream

* Net asset value and share price performance includes the warrant
reinvestment, assuming the 2004 and 2006 bonus warrant entitlement per share
was sold and the proceeds reinvested on the first day of trading.

At month end                                                                   
Net asset value                         Including Income           Capital only
Undiluted/Diluted:                               736.56p*               736.09p
* Includes net revenue of 0.47p                                                
                                                                               
Share price:                                     621.00p                       
Discount to NAV**:                                 15.6%                       
Total assets:                                 £1,350.05m                       
Net yield:                                          0.8%                       
Gearing:                                            3.0%                       

Ordinary shares in issue: 177,762,242                                          
Ordinary shares held in Treasury: 15,249,600                                   

** Discount to NAV based on capital only.                                      

                                                                               
Sector                           % Total Country Analysis               % Total
                                  Assets                                 Assets
                                                                               
Diversified                        48.1  Latin America                    26.6 
Base Metals                        20.1  Global                           25.1 
Gold                               10.9  South Africa                     10.4 
Platinum                            7.5  Other Africa                      9.8 
Silver and Diamonds                 6.3  Australasia                       8.3 
Industrial Minerals                 5.6  Canada                            6.2 
Other                               0.4  India                             3.5 
Net current assets                  1.1  USA                               3.4 
                                         Indonesia                         3.2 
                                         Emerging Asia                     1.4 
                                         Europe                            1.0 
                                         Net current assets                1.1 
                                  -----                                  ----- 
                                  100.0                                  100.0 
                                  =====                                  ===== 

                                                                               
Ten Largest Equity Investments (in alphabetical order)                          
                                                                               
Company                                                                        
BHP Billiton                                                                   
First Quantum Minerals                                                         
Freeport McMoRan                                                               
Fresnillo                                                                      
Glencore Finance (Europe) 5% 31/12/14                                          
Impala Platinum                                                                
Minas Buenaventura                                                             
Rio Tinto                                                                      
Teck Resources                                                                 
Vale                                                                           

Commenting on the markets, Evy Hambro, representing the Investment Manager
noted:

Performance
March was a turbulent month for Europe, as uncertainty remained in markets for
much of the period over the Greek sovereign debt concerns and the downgrade of
Portuguese debt by Fitch. The European Union came to the rescue of Greece
towards the end of the month, as Brussels announced a support agreement to
protect their sovereign debt. This vote of confidence was confirmed by the
successful issuance of €5bn of Greek bonds and the Euro strengthened on the
back of this positive news.

March was a strong month for mining commodities with copper touching highs of
US$7,878/t towards the end of the month as the base metal rallied 8.3% in
March. With increased demand from China and the possibility that demand from
the OECD nations may improve, the fundamentals for copper look strong as mine
supply appears to be constrained for the foreseeable future.

Nickel also rallied strongly up by 18.3% to $24,960/t on the last day of the
month. In 2007, Vale bought one of the largest nickel mines in the world in
Sudbury, Ontario. Due to a union dispute, production at this mine has been
off-line since early 2009 resulting in a 5% decrease in global production. As
the dispute was recently resolved, we expect this supply to come back on-line
shortly which may provide short term relief to the supply side.

The market has speculated recently over what will happen to the iron ore
pricing model. The difference between the contract price, (set annually towards
the end of Q1), and the spot price widened significantly in 2009; towards the
end of the benchmark year the spot price rose to be over 100% above the
benchmark price. This can largely be attributed to increased demand from
Chinese steel producers and the signs of tentative recovery in Western world
steel production.

Vale and BHP Billiton have led the iron/steel industry to move from the annual
contract pricing system to a new quarterly contract pricing system and it is
likely that the other iron ore miners will follow suit. This new system should
prevent a large pricing differential developing in the iron ore market again.
At this point a provisional price of $120/t has apparently been agreed by BHP
Billiton; however, the exact contract price has yet to be finalised.

Strategy/Outlook
Over the past month investors concerns have eased somewhat following a
reassurance from the European Union over Greek and Portuguese sovereign debt.
Whilst these recent concerns have abated somewhat, investors remain wary of the
continued volatility though implied valuations remain reasonable on current
spot prices.

We remain positive on the medium to long term outlook as robust growth in
emerging market countries continues and the ability of the supply side to react
to increasing demand is constrained in selected commodities. While we believe
short term volatility in the sector is likely, stock selection and commodity
selection will be key in order to take advantage of opportunities in these
markets. At current commodity prices, the cashflow generation of existing
production is significant and probably not yet reflected in current valuations.

Latest information is available by typing www.blackrock.co.uk/its on the
internet, "BLRKINDEX" on Reuters, "BLRK" on Bloomberg or "8800" on Topic 3 (ICV
terminal).

14 April 2010