UBS Securities LLC - Rule 8.1- (Thomson)

RNS Number:0988S
UBS Securities LLC
10 April 2008

FORM 8.1

DEALINGS BY OFFERORS, OFFEREE COMPANIES OR THEIR ASSOCIATES

FOR THEMSELVES OR FOR DISCRETIONARY CLIENTS

(Rules 8.1(a) and (b)(i) of the Takeover Code)

1. KEY INFORMATION

Name of person dealing (Note 1) UBS Securities LLC

Company dealt in Thomson Corporation (ISIN CA8849031056)

Class of relevant security to which the Common Shares
dealings being disclosed relate (Note 2)

Date of dealing 09 APRIL 2008

2. INTERESTS, SHORT POSITIONS AND RIGHTS TO SUBSCRIBE

(a) Interests and short positions (following dealing) in the class of
relevant security dealt in (Note 3)

Long Short

Number Number
(%) (%)

(1) Relevant securities 0 shares 153574 Shares

(2) Derivatives (other than options)

(3) Options and agreements to purchase/sell

Total 0 shares 153574 Shares

(b) Interests and short positions in relevant securities of the company,
other than the class dealt in (Note 3)

Class of relevant security: Long Short

Number Number
(%) (%)

(1) Relevant securities

(2) Derivatives (other than options)

(3) Options and agreements to purchase/sell

Total

(c) Rights to subscribe (Note 3)

Class of relevant security: Details

3. DEALINGS (Note 4)

Purchases and sales

Buy/Sell Trade Quantity Trade Price (USD)
B 2900 34.93
B 300 35.263
B 1772 35.025
B 10 35.77
B 2100 34.902
S 300 35.027
S 10 35.77
S 2100 34.902
S 1000 35.13
B 51700 36.13 CAD
S 8741 36.63 CAD
Total Buys 58,782
Total Sells 12,151

(b) Derivatives transactions (other than options)

Product name, Long/short (Note 6) Number of securities (Note 7) Price per unit (Note 5)

e.g. CFD

(c) Options transactions in respect of existing securities

(i) Writing, selling, purchasing or varying

Product name, Writing, selling, Number of securities Exercise Type, e.g. Expiry Option money
purchasing, to which the option American,
e.g. call option varying etc. relates (Note 7) price European etc. date paid/received per
unit (Note 5)

(ii) Exercising

Product name, e.g. call option Number of securities Exercise price per unit (Note 5)

(d) Other dealings (including new securities) (Note 4)

Nature of transaction (Note 8) Details Price per unit (if applicable) (Note 5)

4. OTHER INFORMATION

Agreements, arrangements or understandings relating to options or derivatives

Full details of any agreement, arrangement or understanding between the person disclosing and any other person relating
to the voting rights of any relevant securities under any option referred to on this form or relating to the voting
rights or future acquisition or disposal of any relevant securities to which any derivative referred to on this form is
referenced. If none, this should be stated.

Is a Supplemental Form 8 attached? (Note 9) YES/NO

Date of disclosure 10 April 2008

Contact name Richard Mulcahy

Telephone number 001 203 719 0467

Name of offeree/offeror with which associated Reuters Group PLC
Specify category and nature of associate status (Note 10) Connected Advisor

Notes

The Notes on Form 8.1 can be viewed on the Takeover Panel's website at
www.thetakeoverpanel.org.uk

This information is provided by RNS
The company news service from the London Stock Exchange
END

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