VLS.L Regulatory News (VLS)

23rd August 2013

Oxford Catalysts Group PLC

Updated Regulatory Disclosure Directors' Appointments

Pursuant to AIM Rule 17 and Schedule 2 Annex III of the AIM Rules, Oxford Catalysts Group PLC provides the following disclosures relating to its directors.

Roy Lipski

Chief Executive Officer

Current Directorships:

Oxford Catalysts Group PLC

Oxford Catalysts Limited

Susan Robertson

Chief Financial Officer

Current Directorships:

Oxford Catalysts Group PLC

Oxford Catalysts Limited

Oxford Catalysts Trustees Limited

Velocys Limited

Velocys Technologies Limited

Paul Schubert

Executive Director

Current Directorships:

Oxford Catalysts Group PLC

Andrew Jamieson

Non-Executive Director

Current Directorships:

Hoegh LNG Ltd

Oxford Catalysts Group PLC

Oxford Catalysts Trustees Limited

Seven Energy International Limited

Woodside Petroleum Limited

Zanthus International Limited

Pierre Jungels

Chairman

Current Directorships:

Baker Hughes Inc

Oxford Catalysts Group PLC

Rockhopper Exploration PLC

Previous Directorships (previous 5 years):

Imperial Tobacco Group PLC

Woodside Petroleum Limited

Sandy Shaw

Non Executive Director

Current Directorships:

Oxford Catalysts Group PLC

PTP Associates Limited

Previous Directorships (previous 5 years):

Ithaca North Sea Limited

Ithaca Petroleum Limited

Ithaca Exploration Limited

Ithaca Causeway Limited

Ithaca Gamma Limited

Ithaca Delta Limited

Ithaca Epsilon Limited

Valiant Alpha (N.I.) Limited

Valiant Petroleum Holdings AS

Valiant Petroleum Norge AS

Valiant Petroleum ehf

Valiant Technology AS

SDS Energy Consultants*

Valiant Petroleum plc

*Dissolved on 31 March 2011: Corporate entity no longer required, no amounts outstanding to creditors

Jan Verloop

Non Executive Director

Current Directorships:

Amvapur BV

Causa Innovatie BV

CITIGS BV

Commonwealth Partnership for Technology Management Limited

Oxford Catalysts Group PLC

Previous Directorships (previous 5 years):

Causa Innovatie*

*Dissolved on 15.02.2013

Julian West

Non Executive Director

Current Directorships:

Julian West Consultancy Limited

Oxford Catalysts Group PLC

- Ends -

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 90 employees with facilities near Oxford, UK and Columbus, Ohio, USA.

Oxford Catalysts Group PLC is changing its name to Velocys plc on 25th September 2013.

www.oxfordcatalysts.com

www.velocys.com