Portfolio Update

BLACKROCK WORLD MINING TRUST plc
All information is at 31 July 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)       7.4%     -5.2%     35.7%      1.5%    142.4%          
Net asset value* (diluted)         7.5%     -5.2%     35.7%      6.7%    139.3%          
Share price*                       3.0%     -7.4%     32.6%     -3.8%    127.7%          
HSBC Global Mining Index           3.9%     -9.0%     28.7%     23.5%    162.0%          

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:                               677.07p#               673.12p
# Includes net revenue of 3.95p                                                
                                                                               
Share price:                                     565.50p                       
Discount to NAV**:                                 16.0%                       
Total assets:                                 £1,228.48m                       
Net yield:                                          0.8%                       
Gearing:                                            2.0%                       

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                    46.0  Latin America                28.4 
Base Metals                    19.2  Global                       25.5 
Gold                           12.4  South Africa                 10.0 
Silver & Diamonds               7.4  Other Africa                  9.4 
Platinum                        7.3  Australasia                   9.1 
Industrial Minerals             6.2  Canada                        5.6 
Other                           0.5  India                         3.1 
Net current assets              1.0  Indonesia                     3.0 
                                     USA                           2.7 
                                     Emerging Europe               1.3 
                                     Europe                        0.9 
                                     Net current assets            1.0 
                              -----                              ----- 
                              100.0                              100.0 
                              =====                              ===== 

                                                                               
Ten Largest Investments (in alphabetical order)                                 
                                                                               
Company                                                                        
BHP Billiton                                                                   
First Quantum Minerals                                                         
Fresnillo                                                                      
Freeport McMoRan                                                               
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
Risk appetite returned to the market in July as a result of positive news flow
from companies (as Q2 results were largely positive), an upbeat IMF report, and
reassuring data emerging from European bank stress tests.

Base metals rallied from their lows in June, with copper and aluminium gaining
12% and 11% respectively, over the month. After a lull over the early summer
period, increased manufacturing demand from China has driven a small restocking
cycle and led to a drawdown of base metal inventory levels at exchanges.

The iron ore spot price staged a strong rebound in the second half of July,
following a period of poor performance between April and mid-July where the
price fell by 37%. These falls added to fears that weak steel pricing would
cause iron ore contract prices to fall further. However, the contract iron ore
price remains at US$147/t which is a 50% premium to the price for 2009. This
higher contract price has translated into significant increases in cashflow for
a number of companies producing bulk commodities such as BHP, Vale and Rio
Tinto.

Safety issues in South African mining were in focus during the month following
an accident at the Marikana platinum mine, owned by Aquarius Platinum. A rock
fall at the mine face resulted in the proposal by the government of several
health and safety initiatives, highlighting the cost and operational
difficulties facing the South African platinum group metals industry. We
believe this may place upward pressure on the platinum price, as this may add
tightness to a market that is already experiencing long term supply side
issues.

Rio Tinto announced their June quarter results in early August which were well
ahead of consensus. This was mainly driven by the iron ore business where a
higher contract price contributed significantly to earnings. On the negative
side, Rio Tinto and BHP Billiton both reported guidance of a 5-10% downgrade in
copper production from the Escondida mine in Chile. This is the world's largest
copper producing mine and this decline will help further tighten the copper
market.

Strategy/Outlook
We believe that while 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.

The medium to long term outlook for the mining sector appears robust, with
emerging markets forecasts continuing to exhibit strong growth, and supply
remains constrained in its ability to meet demand increase. Whilst some
investors may be fearful of monetary policy change in China we view this as a
long term positive as it is indicative of a strong economy and a government
that is looking to manage that growth. However in the short term, general
market sentiment is having a greater affect on equity markets than commodity
specific drivers.


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).

18 August 2010