2016 Labour Party leadership election (UK) – Wikipedia

The 2016 Labour Party leadership election was called when a challenge to Jeremy Corbyn as Leader of the Labour Party arose following criticism of his approach to the Remain campaign in the referendum on membership of the European Union and questions about his leadership of the party.. After a period of tension over Corbyn’s leadership, the immediate trigger to events was the Leave result of …

https://en.wikipedia.org/wiki/Labour_Party_(UK)_leadership_election,_2016