Portfolio Update

BLACKROCK WORLD MINING TRUST plc
All information is at 31 August 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)      -0.2%      0.6%     30.0%      6.9%    134.3%          
Net asset value* (diluted)        -0.2%      0.6%     30.0%     11.7%    131.3%          
Share price*                       1.9%     -1.1%     31.2%      5.0%    128.0%          
HSBC Global Mining Index           0.8%     -2.8%     28.1%     28.4%    158.5%          

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:                               675.54p#               670.63p
# Includes net revenue of 4.91p                                                
                                                                               
Share price:                                     576.00p                       
Discount to NAV**:                                 14.1%                       
Total assets:                                 £1,225.88m                       
Net yield:                                          0.8%                       
Gearing:                                            2.1%                       

Ordinary shares in issue: 177,712,242                                          
Ordinary shares held in Treasury: 15,299,600                                   

** Discount to NAV based on capital only.                                      

                                                                               
Sector                           % Total Country Analysis               % Total
                                  Assets                                 Assets
                                                                               
Diversified                        43.5  Latin America                    28.3 
Base Metals                        19.6  Global                           25.4 
Gold                               13.7  Australasia                      10.6 
Silver & Diamonds                   7.6  Other Africa                      9.7 
Platinum                            6.6  South Africa                      9.2 
Industrial Minerals                 7.3  Canada                            5.4 
Other                               0.5  Indonesia                         3.2 
Net current assets                  1.2  USA                               2.8 
                                         India                             2.2 
                                         Emerging Europe                   1.2 
                                         Europe                            0.8 
                                         Net current assets                1.2 
                                  -----                                  ----- 
                                  100.0                                  100.0 
                                  =====                                  ===== 

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


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

Performance
Mixed economic data was the root cause of a volatile month for equity markets
in general and miners experienced a sell off as investors remained uneasy over
the prospects of global economic recovery.

That said, base metals held up well in August, especially those constrained on
the supply side: copper prices rose by 2% and tin almost by 8% over the course
of the month, with the former touching four month highs going into September.
The tightness in copper supply is becoming ever more documented and this
increased focus, coupled with a strong commodity price, bodes well for copper
miners. We continue to see evidence of significant cash flow generation at low
multiples by our favoured companies in the space.

The new quarterly pricing system has dictated a fall in the price of iron ore
and coking coal for October until the end of 2010: iron ore will fall by around
12% and coking coal by around 7%. The system, which links quarterly prices to
spot prices, has replaced the old annual contracts. Despite this fall in
received prices for the fourth quarter, we believe that margins are
sufficiently robust and the demand profile encouraging enough to mitigate any
downward pressure, especially given the low valuations on which the producers
are trading.

August was a busy month for corporate activity in the mining space. BHP
Billiton provided the most significant development by launching an all cash bid
for Potash Corp of Saskatchewan at US$130 a share. Potash Corp is, by capacity,
the world's largest fertiliser company. The bid represented a 20% premium to
the 11 August closing price. The acquisition would diversify BHP's book of
business and give them exposure to a `tier one' potash asset base, a commodity
almost uniquely used for the production of fertilisers. The bid process is
underway and will play out over the coming months.

Strategy/Outlook
The medium to long term outlook for the mining sector still appears robust.
Emerging markets forecasts continue to exhibit strong growth and supply remains
constrained in its ability to meet demand increase.

Double dip fears still reside, but we would highlight that the economic data
being released is mixed rather than uniformly negative and has given us no
cause to substantially revise our outlook, particularly given the low
valuations at which the sector is trading. At these levels, we would not be
surprised to see further M&A activity within the mining sector.


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 September 2010