The Company has 466,854,531 ordinary shares in issue, of which 56,673,333 are owned by a member of the Group and treated as treasury shares, resulting in a total of 410,181,198 voting shares.

As far as the Company is aware the percentage of voting shares not in public hands (for the purpose of the AIM rules) is approximately 34%.

The identity of the Company's significant shareholders (for the purpose of the AIM rules) and their percentage holding of voting shares are:

AVIVA PLC (and its subsidiaries)*	19.96%
ANDREW BLACK	14.1%
J.M. FINN & CO. LTD*	5.24%
THESIS ASSET MANAGEMENT	4.88%
ROYAL LONDON ASSET MANAGEMENT*	4.83%
LUDGATE ENVIRONMENTAL FUND**	3.78%
Mr D V PENMAN**	3.15%

* per notification to the Company

** per shareholder register analysis 25 November 2011

There are no restrictions on the transfer of the Company’s shares.

This information was last updated on 31 January 2012.