Portfolio Update

BLACKROCK WORLD MINING TRUST plc

All information is at 30 April 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)        8.8%     13.9%     42.1%    267.7%    551.6%          
Net asset value* (diluted)          8.5%     18.9%     44.5%    261.2%    526.2%          
Share price*                        7.6%     20.3%     35.0%    251.4%    563.1%          
HSBC Global Mining Index            8.4%     14.4%     46.6%    234.4%    436.6%          

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:                                     844.35p*               840.11p  
Diluted:                                        831.02p               826.98p  
*Includes net revenue of 4.24p                                                 
                                                                               
Share price:                                    713.50p                        
Discount to NAV**:                               13.72%                        
Warrant price:                                  176.50p                        
Total assets:                                £1,499.75m                        
Net yield:                                        0.42%                        
Gearing:                                             0%                        

Ordinary shares in issue:                   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.                   

Sector Analysis          % of Total  Country Analysis            % of Total
                             Assets                                  Assets
                                                                               
Diversified                    49.1  Latin America                     23.9
Base Metals                    20.2  Global                            20.2
Industrial Minerals             8.6  South Africa                      13.1
Platinum                        7.6  USA                                6.9
Silver/Diamonds                 5.3  Australasia                        6.7
Gold                            5.1  Canada                             6.5
Other                           3.1  Other Africa                       4.6
Net current assets              1.0  Indonesia                          4.2
                                     India                              4.0
                                     Europe                             3.9
                                     Emerging Europe                    3.7
                                     Laos                               0.8
                                     Other                              0.5
                                     Net current assets                 1.0
                              -----                                   -----
                              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                         
Industrias Penoles                        Latin America                        
Minas Buenaventura                        Latin America                        
Rio Tinto                                 Global                               
Teck Cominco                              Canada                               
Vale                                      Latin America                        

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

Market review

April was a more steady period for global financial markets following the
volatility of the preceding months. Much of the performance of the mining
sector was driven by the fact that the market is starting to recognise that
continued strength in commodity prices will allow strong earnings growth in
commodity related stocks. The copper market was strong yet volatile during the
month as it reacted to news of a strike by workers at a mine owned by Codleco.
We are now moving into the bi-annual wage negotiations season in the Latin
American region and we may see further disruptions going forward. Gold
continued its recent slide, declining by -6.7%, as investors took profits and
the US Dollar strengthened.

Strategy/Outlook

The market is beginning to recognise that economic weakness in the US does not
necessarily mean bad news for commodity prices. We are also beginning to see
mining equities start to reflect some of the continued strength in the
underlying commodities which may drive strong earnings for the sector. 2008 may
prove to be a year of record earnings for the mining sector. 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. Over the medium term we
believe that demand for metals and minerals will not be severely derailed by US
economic weakness and we therefore are 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).

19 May 2008