Portfolio Update

BLACKROCK WORLD MINING TRUST plc

All information is at 30 June 2008 and unaudited.

Performance at month end with net income reinvested

                                    One     Three       One     Three      Five
                                  Month    Months      Year     Years     Years
Net asset value* (undiluted)      -5.0%      9.4%     27.4%    228.1%    515.6%          
Net asset value* (diluted)        -4.9%      9.1%     31.4%    218.7%    491.6%          
Share price*                      -4.6%      7.2%     25.7%    215.6%    508.9%          
HSBC Global Mining Index          -2.6%     11.2%     35.4%    204.5%    412.9%          

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:                                      849.23p*                843.35p
Diluted:                                        835.67p                 830.07p
*Includes net revenue of 5.88p                                                 
                                                                               
Share price:                                     710.50p                       
Discount to NAV**:                                14.40%                       
Warrant price:                                   160.50p                       
Total assets***:                              £1,516.03m                       
Net yield:                                         0.42%                       
Gearing:                                           0.00%                       

Ordinary shares in issue (excluding treasury shares):               178,517,729
Warrants in issue:                                                    8,947,605
Ordinary shares held in treasury:                                    14,492,800

** Discount to NAV based on capital only, fully diluted NAV.                   
*** Total assets include current year income.                                  

                                                                               
Sector Analysis                  % Total Country Analysis               % Total
                                  Assets                                 Assets
                                                                               
Diversified                        49.3  Latin America                    24.6 
Base Metals                        17.9  Global                           18.8 
Industrial Minerals                11.5  South Africa                     12.5 
Platinum                            8.0  Canada                            8.2 
Silver/Diamonds                     6.7  USA                               7.9 
Gold                                4.1  Australasia                       7.0 
Other                               3.4  Indonesia                         5.5 
Net current liabilities            (0.9) Other Africa                      4.1 
                                         Europe                            4.1 
                                         India                             3.7 
                                         Emerging Europe                   3.6 
                                         Laos                              0.7 
                                         Other                             0.2 
                                         Net current liabilities          (0.9)
                                  -----                                  ----- 
                                  100.0                                  100.0 
                                  =====                                  ===== 

                                                                               
Ten Largest Equity Investments                                                 
                                                                               
Company                                   Region of Risk                       
Alcoa                                     USA                                  
BHP Billiton                              Global                               
Bumi Resources                            Indonesia                            
Eramet                                    France                               
Impala Platinum                           South Africa                         
Minas Buenaventura                        Latin America                        
Oxiana Resources                          Australasia                          
Rio Tinto                                 Global                               
Teck Cominco                              Canada                               
Vale                                      Latin America                        

Commenting on the markets, Graham Birch, representing the Investment Manager
noted:

Performance

Global equity markets were weak during June and this had a direct effect on the
performance of the mining sector over the month. The equity market weakness
arose as a result of continued fears about the health of the global economy,
heightened inflation and a weaker US Dollar. However, the month saw little
change in the structural tightness in commodity fundamentals. The performance
of commodity related equities is disappointing relative to the commodity prices
(which have remained strong) and episodes of weakness, such as we are currently
seeing, serve to highlight the cheap valuations on which mining companies are
trading at present.

Strategy/Outlook

With commodity prices remaining at attractive levels, it is likely that the
earnings growth of mining companies will be strong this year - 2008 may well
prove to be a year of record earnings for the mining sector. With the second
quarter now passed, a strong results season may be a useful catalyst to the
share prices of mining stocks. On the macro side, whilst US weakness may be
moderating slightly, we do not think that the bad news is over and we may see
volatility continue in the shorter term. However, over the medium term we
believe that demand for metals and minerals will not be severely derailed by US
economic weakness and we are therefore bullish on the outlook for mining
equities.

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).

23 July 2008