Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTERESTS IN SHARES

(1). Identity of the issuer or the underlying issuer of existing shares to
which voting rights are attached (ii):

BlackRock World Mining Trust plc

(2). Reason for the notification (please tick the appropriate box or boxes):

An acquisition or disposal of voting rights: (X)

An acquisition or disposal of qualifying financial instruments which may result
in the acquisition of shares already issued to which voting rights are
attached: ( )

An acquisition or disposal of instruments with similar economic effect to
qualifying financial instruments: ( )

An event changing the breakdown of voting rights: ( )

Other (please specify) : ( )

(3). Full name of person(s) subject to the notification obligation (iii):

City of London Investment Management Company Limited

(4). Full name of shareholder(s) (if different from 3.) (iv):


(5). Date of the transaction and date on which the threshold is crossed or
reached (v):

28 March 2012

(6). Date on which issuer notified:

30 March 2012

(7). Threshold(s) that is/are crossed or reached (vi, vii):

11 %

(8). Notified details:

A: Voting rights attached to shares (viii, ix):

Class/type of shares (if possible using the ISIN code): GB0005774855

Situation previous to the triggering transaction:
Number of Shares: 19,483,840
Number of Voting rights: 19,483,840

Resulting situation after the triggering transaction:
Number of shares (Direct): 19,553,414

Number of voting rights:
Direct (xi):
Indirect (xii): 19,553,414

% of voting rights (x):
Direct:
Indirect: 11.03 %


B. Qualifying Financial Instruments

Resulting situation after the triggering transaction:

Type of financial instrument:

Expiration date (xiii):

Exercise/Conversion Period (xiv):

Number of voting rights that may be acquired if the instrument is exercised/
converted:

% of voting rights:


C. Financial Instruments with similar economic effect to Qualifying Financial
Instruments (xv, xvi)

Resulting situation after the triggering transaction

Type of financial instrument:

Exercise price:

Expiration date (xvii):

Exercise/Conversion period (xviii):

Number of voting rights instrument refers to:

% of voting rights (xix, xx):
Nominal:
Delta:

Total (A + B + C):

Number of voting rights: 19,553,414

Percentage of voting rights: 11.03%

(9). Chain of controlled undertakings through which the voting rights and/or
the financial instruments are effectively held, if applicable (xxi):

All voting rights on all shares are controlled by City of London Investment
Management Limited.

Proxy Voting:

(10). Name of the proxy holder:

City of London Investment Management Company Limited

(11). Number of voting rights proxy holder will cease to hold:

(12). Date on which proxy holder will cease to hold voting rights:

(13). Additional information:

Based on shares outstanding of 177,287,242

(14). Contact name:

Jay McKenna or Chris Weaver


(15). Contact telephone number:

0207 860 8329


30 March 2012