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Jayson Marks



Friary Court
65 Crutched Friars
London EC3N 2AE
United Kingdom

Office Telephone: +44 (0)20 7264 8000
Office Fax: +44 (0)20 7264 8888

Direct Dial (London): +44 (0)20 7264 8116

Mobile: +44 (0)7824 597250 Download VCard

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Jayson specialises in domestic and cross-border acquisitions and disposals, investments, joint ventures, public takeovers, IPOs and other equity capital markets transactions on the main market and AIM. Jayson has particular experience in the upstream oil and gas sector having acted for exploration and production companies and oilfield service companies for a number of years and been seconded to a significant Nigerian oil and gas company. Jayson advises on joint operating agreements, joint ventures, farm-ins, processing agreements and other commercial contracts.

Jayson's experience includes advising:

  • Seven Energy International Limited on its upstream and midstream joint ventures related to the Uquo marginal field, onshore Nigeria.
  • A multi-national oilfield service company on its joint venture to provide local content EPC services and subsea systems in Angola.
  • Regal Petroleum plc on the disposal of its 100% interest in the EV-2 Barlad gas field, Romania to Chevron Exploration and Production Romania B.V. and the disposal of its 50% non-operated interest in the Suceava gas field, Romania to Zeta Petroleum plc.
  • A super major on its acquisition of a 50% interest in a PTA plant in Indonesia.
  • Asia Coal Energy Ventures on its successful $200 million competitive takeover to acquire Asia Resource Minerals plc (formerly Bumi plc) which owns 84.7% of PT Berau, one of the largest thermal coal producing assets in Indonesia.


The London office is the firm's largest, with over 250 lawyers.

It offers the full range of services that HFW provides globally, with partners from the London office working closely with all the other HFW offices, as well as in many jurisdictions around the world. HFW moved to its current premises in September 2008, having previously been in nearby Lloyds Avenue for almost 100 years.

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