Lindsay Croisdale-Appleby is the Ambassador and Head of the UK Mission to the European Union, appointed in January 2021. 

Before his current role, Lindsay was Deputy Sherpa and Deputy Chief Negotiator in Taskforce Europe (10 Downing Street) throughout 2020. He was a Director General in the Foreign & Commonwealth Office (FCO) from 2017 to 2020, working on the EU and other issues.

In the UK, Lindsay was the FCO Director for Europe (2015 to 2017), Principal Private Secretary to the Foreign Secretary (2010 to 2012), and Assistant Director for Recruitment and Development (2008 to 2010). He was Desk Officer in the Afghanistan Emergency Unit (2001 to 2002) and Desk Officer for Nigeria (1996 to 1997).

He has worked overseas as the British Ambassador to Colombia (2013 to 2015), First Secretary at the UK Permanent Representation to the EU (2002 to 2008) and Second Secretary at the British Embassy in Venezuela (1997 to 2001). Lindsay joined the Foreign & Commonwealth Office in 1996.

Lindsay sits as an independent member of the British Council's Remuneration & People Committee.