Lord Hendy's maternal grandfather was a hereditary peer, the 6th Baron Wynford,[2] whose youngest daughter, the Hon.

He then lectured for a year at Middlesex Polytechnic, before returning to the Bar in 1977 to focus on personal injury and industrial relations cases.

[5] In the mid-1980s, he successfully represented Wendy Savage, a consultant obstetrician and gynecologist who was suspended from practice for alleged incompetence.

In 1991, Hendy was one of four QCs, along with Michael Mansfield, Geoffrey Robertson and Kevin Garnett,[11] acting for the National Union of Mineworkers against claims that they had handled funds inappropriately during the miners' strike of 1984–85.

[19] Nominated for a life peerage by Theresa May in her 2019 Prime Minister's Resignation Honours,[20] he was created Baron Hendy, of Hayes and Harlington in the London Borough of Hillingdon, on 15 October 2019.