Portfolio Update

BLACKROCK WORLD MINING TRUST plc
All information is at 30 June 2011 and unaudited.

Performance at month end with net income reinvested
                                  One    Three     One   Three     Five
                                Month   Months    Year   Years    Years
Net asset value* (undiluted)    -0.4%    -1.0%   45.5%   10.5%   105.0%          
Net asset value* (diluted)      -0.4%    -1.0%   45.7%   12.3%   107.1%          
Share price*                    -3.0%    -4.2%   37.8%    9.4%    94.9%          
HSBC Global Mining Index         0.2%    -4.3%   31.8%   19.0%   116.1%          

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:                               917.60p #              912.32p
# Includes net revenue of 5.28p                                                
                                                                               
Share price:                                     756.50p                       
Discount to NAV**:                                 17.1%                       
Total assets:                                 £1,689.52m                       
Net yield:                                          0.6%                       
Gearing:                                            3.6%                       

Ordinary shares in issue: 177,537,242                                          
Ordinary shares held in Treasury: 15,474,600                                   

** Discount to NAV based on capital only.                                      
                                                                               
Sector                % Total  Country Analysis                % Total
                       Assets                                   Assets
                                                                               
Diversified              40.7  Global                             43.9 
Base Metals              22.6  Latin America                      16.8 
Industrial Minerals      14.5  Australasia                        13.7 
Gold                      9.0  Other Africa                        8.7 
Silver & Diamonds         7.1  South Africa                        6.5 
Platinum                  4.1  Canada                              1.8 
Other                     0.4  USA                                 1.8 
Net current assets        1.6  Emerging Europe                     1.7 
                        -----  Republic of Congo                   1.4 
                        100.0  Democratic Republic of Congo        0.9 
                        =====  Mongolia                            0.7 
                               Indonesia                           0.5 
                               Net current assets                  1.6 
                                                                 -----
                                                                 100.0
                                                                 =====

Ten Largest Investments                                                        
                                                                               
Company                                   % Total Assets  
Rio Tinto                                            9.4  
BHP Billiton                                         7.0  
Vale                                                 6.7  
Glencore Finance (Europe) 5% 31/12/14                5.8  
First Quantum Minerals                               5.0  
Teck Resources                                       4.3  
Minas Buenaventura                                   4.2  
Freeport McMoRan                                     3.9  
Iluka Resources                                      3.8  
Fresnillo                                            3.4  


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

Performance
Mining equities, along with broader equity markets, remained firmly in the grip
of macro economic focused market sentiment in June. In the first half of the
month, Eurozone sovereign debt concerns (sharpened by S&P's further downgrade
of Greek debt) and lacklustre economic signals from the US conspired against
equities and risk assets. Markets bounced, however, in the latter stages of the
month, mining equities among them, amidst some more positive indications at the
macro economic level: in a well received statement, Chinese premier Wen Jiabao
asserted that efforts to control inflation in the world's largest economy were
having the desired effect, some stronger data was forthcoming in the US and the
Greek parliament, amidst public discontent, approved a crucial austerity
package.

Mining commodities shared a significant portion of the stress and relief that
buffeted their equity counterparts. Copper was notable however in exhibiting
resilience. The red metal in fact finished the month in positive territory at
$9,414/tonne having appreciated 2.3%. It was an encouraging performance and one
driven in part by the emerging evidence of inventory draw downs and low stock
levels for the metal. Inventory at the Shanghai Futures Exchange (SHFE) reached
its lowest level since 2009 in the course of the month. Analysts also commented
that off exchange stocks were in a similarly reduced state. Elsewhere in the
base metals complex, trade data into China showed a sharp rise in the imports
of low grade nickel ore, as China's nickel pig iron production appears to be
ramping up.

Iron ore prices have shown resilience in 2011 on the back of constrained
exports from key areas such as Australia and Brazil and comparatively robust
demand. Iron ore's largest producer, Vale, announced at the end of the month
that it is embarking on a share buy back programme that could return as much as
$3bn to shareholders. The Brazilian major's decision sent a positive signal and
is yet another example in the recent trend of mining companies placing
increased emphasis on servicing shareholder capital.

Strategy/Outlook
2011 has so far been a volatile period for mining equities. The sector has at
times been at the mercy of macroeconomic uncertainty and has broadly been at
the forefront of any risk on/risk off trade. The fundamentals for our favoured
commodities continue to look supportive.

The strength of those fundamentals are not being fully reflected in equity
valuations which look attractive not only on a historical basis but also when
considered in light of the exceptional levels of free cashflow mining companies
are able to generate at current commodity prices. The trends of more mergers
and acquisition activity as well as returns to shareholders in the form of
dividends and share buybacks are likely to get further traction in the second
half of the year.


20 July 2011


ENDS

Latest information is available by typing www.blackrock.co.uk on the internet,
"BLRKINDEX" on Reuters, "BLRK" on Bloomberg or "8800" on Topic 3 (ICV
terminal). Neither the contents of the Manager's website nor the contents of
any website accessible from hyperlinks on the Manager's website (or any other
website) is incorporated into, or forms part of, this announcement.