Peter de Putron
Peter de Putron is a banker who lives in Guernsey and is the brother-in-law of the former UK financial services minister and now Leader of the House of Commons, Andrea Leadsom. He is the founder of De Putron Fund Management.
Donations were made to his sister-in-law Andrea Leadsom directly through UK-registered companies controlled by de Putron: Gloucester Research, which changed its name to GR Software & Research, then to Trenchant, and now trades under yet another name, G-Research. Leadsom's husband, Ben Leadsom, is a director.
Before being elected Conservative MP for South Northamptonshire in 2010, Leadsom was Managing Director of De Putron Fund Management between 1997 and 1999. Using data gathered by the Washington-based organisation the International Consortium of Investigative Journalists, a July 2014 report by The Guardian found that her brother-in-law Peter de Putron had donated £816,000 to the Conservative Party since 2010. 
Dining with ministers
A seating plan of the Conservative Party's Black and White Ball, in February 2014, was leaked to the Bureau of Investigative Journalism in October 2014. The party, which guests pay between £450 and £1000 for a ticket, seats diners with the minister most relevant to them. It revealed that de Putron was sat at a table with Jeremy Hunt MP, the Secretary of State for Health and and Jersey’s Treasury minister, Philip Ouzouf. 
- David Leigh, James Ball and Leila Haddou, Top Tory has family link with offshore banker who gave party £800,000, The Guardian, 8 July 2014, acc 16 July 2014
- ‘LEADSOM, Andrea Jacqueline’, Who's Who 2014, A & C Black, an imprint of Bloomsbury Publishing plc, 2014; online edn., Oxford University Press 2013, accessed 9 July 2014.
- Melanie Newman, Nick Mathiason and Tom Warren Doorstep lender and property moguls amongst guests worth £22bn at Tory fundraiser Bureau of Investigative Journalism, 12 October 2014, accessed 14 October 2014