Holding(s) in Company

TR-1(i): 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 North American Income Trust plc

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

An acquisition or disposal of voting rights: ( )

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

An event changing the breakdown of voting rights: ( )

Other (please specify) : (X) Increase in Total Voting Rights

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

Investec Wealth & Investment Limited

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

n/a

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

28 March 2013

(6). Date on which issuer notified:

2 April 2013

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

From 13% to 12%

(8). Notified details:

A: Voting rights attached to shares

Class/type of shares (if possible using the ISIN code): Ord/GB00B7W0XJ61

Situation previous to the triggering transaction(vi):
Number of Shares: 9,689,160
Number of Voting rights(viii): 9,689,160

Resulting situation after the triggering transaction(vii):
Number of shares:
DIRECT:
Number of voting rights (ix):
Direct (x):
Indirect (xi): 9,689,160

% of voting rights:
Direct:
Indirect: 12.99%

B. Financial Instruments

Resulting situation after the triggering transaction (xii):

Type of financial instrument:

Expiration date (xiii):

Exercise/Conversion Period/Date (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 Instruments
(xv), (xvi)

Resulting situation after the triggering transaction:

Type of financial instrument:

Exercise Price:

Expiration date (xvii):

Exercise/Conversion Period/Date (xviii):

Number of voting rights instrument refers to:

% of voting rights (xix) (xx):

Nominal:
Delta:

Total (A + B + C):

Number of voting rights: 9,689,160

% of voting rights: 12.99%

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

Client holdings registered in the name of Nominee companies 100% owned by
Investec Wealth & Investment Limited.

Proxy Voting:

(10). Name of the proxy holder:

N/A

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

N/A

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

N/A

(13). Additional information:

N/A

(14). Contact name:

Mrs A B Powley
For BlackRock Investment Management (UK) Limited
Secretary

(15). Contact telephone number:

020 7743 5610


2 April 2013