Gregg specialises in complex commercial disputes with a focus on the energy, natural resources and aviation sectors.
He has extensive experience of litigation – usually with a cross-border element – in the courts of England and other jurisdictions, as well as international arbitration under various institutional rules.
Gregg has a particular interest in group litigation and co-ordinates the firm's class action practice in London. He is a co-editor and author of Class Actions in England and Wales, published by Sweet & Maxwell.
Gregg advises a broad range of leading companies on their most challenging corporate and commercial disputes and risks. Many of his cases arise in the United Kingdom and emerging markets, particularly Africa.
Having previously been seconded to the firm's Tokyo office, Gregg has considerable experience of disputes in various Asian jurisdictions. He continues to work closely with many of the firm's Japanese clients and leads the Japan desk of our London office.
Gregg's energy and natural resources practice covers a wide spread of oil and gas, power, nuclear, mining, commodity trading and project and trade finance disputes. In the aviation sector, he regularly advises airports, airlines and aircraft lessors.
Gregg also advises clients on competition disputes, as well as various forms of ADR including adjudication, expert determination and mediation. He is an accredited mediator with the Centre for Effective Dispute Resolution and was a member of the organising committee for the Global Pound Conference in London.
Gregg is one of the firm's Social Mobility Partners.
Gregg's experience includes advising
- advising BP, ENI, Repsol Sinopec and JX Nippon in Commercial Court proceedings under various gas sales agreements arising out of the prolonged shut-in of a North Sea field
- advising a US energy company in relation to an expert determination, an arbitration and parallel court proceedings relating to the re-determination of equity interests in a unitised oil field in West Africa
- advising a British oil exploration company in relation to multi-jurisdictional court and arbitral proceedings concerning disputes rights in an oil concession in Central Africa
- advising a Japanese consortium in a LCIA arbitration with satellite offshore litigation in a dispute relating to a mining project in Central Asia
- advising a multinational energy company in a successful application to stay Commercial Court proceedings for arbitration and related court proceedings in Germany relating to interests in oil assets in Central Asia
- advising a Japanese trading company in commodity trading disputes in multiple jurisdictions, including an ad hoc arbitration in India
- advising Société Générale in relation to a $1.5 billion claim in the Commercial Court by the Libyan Investment Authority in relation to a series of trades where there were allegations of bribery and intimidation
- advising AerCap in respect of the repossession of aircraft and ensuing Commercial Court litigation, with parallel proceedings in several other jurisdictions, arising out of the default under and termination of various lease agreements
Gregg was educated at King's College London (LLB), Keble College, Oxford (BCL, MPhil) and Panthéon-Sorbonne, Paris (LLM). Prior to joining the firm, he practised at the bar for several years from King's Chambers in Manchester. He is fluent in French.