Leslie has been the chairman of Calunius Capital LLP since January 2009. Calunius acts as the investment adviser to Calunius Funds, market leaders in the funding of large scale international arbitration and litigation disputes.

Leslie has also been the chairman of the Association of Litigation Funders of England and Wales since its establishment in November 2011 and is deeply involved in the development of litigation funding as an international phenomenon.

Leslie has more than 30 years' experience of litigation markets, having been successively head of litigation, managing partner and senior partner at international law firm Osborne Clarke.

For nine years until recently he was the senior independent director of DAS UK, the UK market leader in legal expenses insurance.