Leo McKinstry (born 1962) is a British journalist, historian and author.
Born in Belfast, Northern Ireland, McKinstry was educated at Portora Royal School, Enniskillen, and Sidney Sussex College, Cambridge, where he graduated with a degree in history in 1985, and identified himself as a Trotskyist.
[5] He often writes about issues relating to immigration and the European Union, being a strong supporter of Brexit.
His books include a biography of the Victorian Prime Minister, Lord Rosebery.
Losing his seat on Islington council in 1994, he was working for Labour frontbencher Doug Henderson when he announced the following year, via an article in The Spectator, that he no longer supported the party.