VLS.L Regulatory News (VLS)

OXFORD CATALYSTS GROUP PLC

("Oxford Catalysts" or "the Company")

Total Voting Rights

The Company announces that, following the issue of new Ordinary Shares pursuant to the exercise of employee share options and issue of bonus shares during the month ended 30 April 2013 and their admission to trading on AIM under the Company's blocklisting, the total issued share capital of the Company is 115,997,461 Ordinary Shares, each with voting rights.

The Company does not currently hold any shares in treasury. Accordingly, this figure of 115,997,461 Ordinary Shares may be used by shareholders in the Company as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change in their interest in, the share capital of the Company under the FSA's Disclosure and Transparency Rules.

For further information, please contact:

Notes to Editors

Oxford Catalysts enables Gas-to-Liquids (GTL) plants to convert unconventional, remote and problem gas into valuable liquid fuels. Systems based on the Group's technology (marketed under the brand name Velocys) are significantly smaller than those using conventional technology, enabling modular plants that can be deployed cost effectively in remote locations and on smaller fields than is possible with competing systems. Together with world-class partners, Oxford Catalysts provides complete smaller scale modular GTL solutions that address an untapped market of up to 25 million barrels of fuel a day.

Oxford Catalysts Group PLC is listed on the AIM market of the London Stock Exchange (LSE: OCG). The Group has some 85 employees with facilities near Oxford, UK and Columbus, Ohio, USA.

www.oxfordcatalysts.com

www.velocys.com