Portfolio Update

BLACKROCK WORLD MINING TRUST plc
All information is at 31 March 2009 and unaudited.

Performance at month end with net income reinvested
                                    One     Three       One     Three      Five
                                  Month    Months      Year     Years     Years
Net asset value* (undiluted)      17.3%     14.9%    -50.3%    -16.9%     76.2%          
Net asset value* (diluted)        17.3%     14.9%    -49.7%    -15.9%     75.2%          
Share price*                      16.9%     32.8%    -49.4%    -18.8%     74.8%          
HSBC Global Mining Index          16.8%      8.8%    -37.6%      1.0%    100.9%          

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/Diluted:                               379.49p#               378.72p
# Includes net revenue of 0.77p                                                 
                                                                               
Share price:                                     329.00p                       
Discount to NAV**:                                13.13%                       
Total assets***:                                £647.58m                       
Net yield:                                         0.91%                       
Gearing:                                              0%                       

Ordinary shares in issue (excluding treasury shares):               177,762,242
Ordinary shares held in treasury:                                    15,249,600

** Discount to NAV based on capital only.                                      
*** Includes current year revenue.                                             

                                                                               
Sector                           % Total Country Analysis               % Total
                                  Assets                                 Assets
                                                                               
Diversified                        38.0  Latin America                    32.6 
Gold                               17.1  Global                           17.1 
Base Metals                        14.9  South Africa                     12.1 
Platinum                            8.8  Australasia                      10.3 
Silver/Diamonds                     7.4  USA                               7.3 
Industrial Minerals                 6.8  Canada                            5.1 
Other                               3.4  Other Africa                      5.0 
Net current assets                  3.6  Indonesia                         3.3 
                                         India                             2.2 
                                         Europe                            0.5 
                                         Laos                              0.5 
                                         Emerging Asia                     0.4 
                                         Net current assets                3.6 
                                  -----                                  ----- 
                                  100.0                                  100.0 
                                  =====                                  ===== 
                                                                               
Ten Largest Equity Investments                                                 
                                                                               
Company (alphabetical order)                                                
African Rainbow Minerals                                                       
BHP Billiton                                                                   
First Quantum Minerals                                                         
Fresnillo                                                                      
Impala Platinum                                                                
Industrias Penoles                                                             
Minas Buenaventura                                                             
Newcrest Mining                                                                
Rio Tinto                                                                      
Vale                                                                           

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

Market review
March was a strong month for the mining sector. The settlement of thermal and
coking coal contract prices above consensus expectations, some tentative signs
that the Chinese economy may have picked up from its lows in November and
December and stronger base metal prices drove the rally in mining shares. Of
particular note was the 19.0% rise in the copper price owing to strategic
buying by the Chinese State Reserve Bureau and an apparent pick-up in end user
demand.

In company news, China Minmetals' bid for OZ Minerals (0.7%) was rejected by
the Australian government on the basis that one of its key assets - Prominent
Hill - was located close to a weapons testing site. China Minmetals
subsequently revised their bid by removing Prominent Hill from the deal
proposal and reducing the price of the offer from US$1.7bn to US$1.2bn. The 
deal must still obtain FIRB (Foreign Investment Review Board) and shareholder
approval but the bid looks increasingly likely to be successful. The rejection
of the original deal by the Australian government has important implications
for the Chinalco bid for Rio Tinto. The FIRB have extended the deadline for
their decision by 90 days and there has been increasing speculation in the
market about possible alternatives to the Chinalco deal.

Strategy/Outlook
The main area of concern for investors remains the demand side of the equation
and there has been little clarity to this dynamic in recent periods, although
there are certainly some positive signals coming out of China. Whilst more
certainty on demand is crucial for the short term, investors with a reasonable
time horizon will be cheered to see the supply reaction by the mining
companies; this may well prove crucial in the future. Mining shares are
"long-dated" assets but which have been behaving more like "short-dated" assets
in recent months; this situation will not last forever and investors should
take advantage of it while they can.

^ Graham Birch is on sabbatical until next year.

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).

22 April 2009