Holding(s) in Company

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial
instrument

Exercise
price

Expiration
date

Exercise/
Conversion
period

Number of voting
rights instrument
refers to

% of voting rights

RNS Number : 8218S

Workspace Group PLC

16 September 2010

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES

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

Workspace Group PLC

2 Reason for the notification (please tick the appropriate box or boxes):
An acquisition or disposal of voting rights		Yes
An acquisition or disposal of qualifying financial instruments which may result in the acquisition of shares already issued to which voting rights are attached		No
An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments		No
An event changing the breakdown of voting rights		No
Other (please specify):		No

3. Full name of person(s) subject to the notification obligation:	Ameriprise Financial, Inc. and its group
4. Full name of shareholder(s) (if different from 3.):	See additional information under 13.
5. Date of the transaction and date on which the threshold is crossed or reached:	14 September 2010
6. Date on which issuer notified:	16 September 2010
7. Threshold(s) that is/are crossed or reached:	Above the threshold of 5%

8. Notified details:
A: Voting rights attached to shares
Class/type of shares if possible using the ISIN CODE	Situation previous to the triggering transaction		Resulting situation after the triggering transaction
	Number of Shares	Number of Voting Rights	Number of shares	Number of voting rights		% of voting rights
			Direct	Direct	Indirect	Direct	Indirect
GB0005296354	N/A	N/A	0	0	79,569,520	0.000%	6.903%

B: Qualifying Financial Instruments
Resulting situation after the triggering transaction
Type of financial instrument	Expiration date	Exercise/ Conversion Period	Number of voting rights that may be acquired if the instrument is exercised/ converted.	% of voting rights

Total (A+B+C)

Number of voting rights

Percentage of voting rights

79,569,520

6.903%

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

Ameriprise Financial, Inc., which through intermediate holding companies controls the voting rights of Columbia Management Investment Advisers, Columbia Wanger Asset Management, Threadneedle Management Luxembourg S.A. and Threadneedle Asset Management Holdings Ltd, which itself controls the voting rights of Threadneedle Asset Management Ltd, Threadneedle International Ltd and Threadneedle Pensions Ltd

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:

Registered Owner

Columbia Wanger Asset
Management LLC A/c 79,527,520

Littledown Nominees
Ltd A/c 10479 42,000

14. Contact name:

Stacey Dryburgh, Threadneedle Group