Portfolio Update

BLACKROCK WORLD MINING TRUST plc

All information is at 31 July 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)     -12.8%    -12.2%      8.6%    159.4%    383.2%
Net asset value* (diluted)       -12.3%    -11.9%     12.8%    153.1%    366.5%
Share price*                     -13.7%    -14.0%      1.6%    140.4%    376.3%
HSBC Global Mining Index         -12.7%    -10.4%     15.0%    144.0%    302.5%

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:                                       740.93p*               734.46p
Diluted:                                         732.54p                726.37p
*Includes net revenue of 6.47p                                                 
                                                                               
Share price:                                     613.50p                       
Discount to NAV**:                                15.54%                       
Warrant price:                                    83.50p                       
Total assets***:                              £1,337.29m                       
Net yield:                                         0.49%                       
Gearing:                                           1.09%                       

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                        51.3  Latin America                     26.3 
Base Metals                        17.9  Global                            19.0 
Industrial Minerals                11.2  South Africa                      12.1 
Platinum                            7.2  Canada                             8.5 
Silver/Diamonds                     6.9  USA                                8.2 
Gold                                4.8  Australasia                        7.8 
Other                               3.7  Indonesia                          5.2 
Net current liabilities            (3.0) Other Africa                       4.6 
                                         India                              3.9 
                                         Emerging Europe                    3.4 
                                         Europe                             3.3 
                                         Other                              0.7 
                                         Net current liabilities           (3.0)
                                  -----                                   ----- 
                                  100.0                                   100.0 
                                  =====                                   ===== 

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

Performance
Global equity markets were especially weak during July and the mining sector
was no exception. Much of this equity market weakness was due to concerns over
the potential for a slow down in the US to affect Chinese consumption which, in
turn, negatively affected sentiment towards the mining sector and commodity
prices. However, China's second quarter GDP growth was announced during the
month and came in at 10.1%, slightly lower than the 10.6% of the first quarter,
but still highly supportive of continued strong demand for metals and minerals
from the country. We also started to see second quarter results announcements
during the month which were generally strong, as we had expected, but often
share prices did not react as the results were overshadowed by the equity
market malaise and negative sentiment to the commodity sector.

Strategy/Outlook
Chinese domestic demand growth appears to be resilient to the slowdown in the
developed world and commodity-intensive industries have not been dramatically
impacted. China is expected to spend US$9 trillion on infrastructure over the
next decade and emerging markets as a whole are predicted to spend US$21
trillion; therefore demand growth for commodities is unlikely to be that
severely impacted in the medium term by what is going on in today's "developed"
markets. We anticipate that although volatility is likely to continue,
commodity prices are likely to remain strong and this may prove to be a record
year for earnings in the mining sector. With this in mind and mining equities
currently trading on what are historically very low valuation multiples, the
sector appears to offer interesting opportunities for investors.

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).

20 August 2008