​A Brief History of George Smiley by John Le Carré

“George Smiley OBE is a fictional character created by John le Carré. Smiley is a career intelligence officer with ‘The Circus’, the British overseas intelligence agency. He is a central character in the novels Call for the Dead, A Murder of Quality, Tinker Tailor Soldier Spy, The Honourable Schoolboy, and Smiley’s People, and a supporting character in The Spy Who Came in from the Cold, The Looking Glass War, The Secret Pilgrim and A Legacy of Spies. The character has also appeared in a number of film, television, and radio adaptations of le Carré’s books. …“

Wikipedia

Penguin: Explore Smiley’s London

BBC: How fact met fiction in Le Carré’s secret world

Guardian: A Brief History of George Smiley by John Le Carré

2019 November: ‘Point me and I’ll march’: Mick Herron re-reads the novels of John le Carré, 2020 December: John le Carré, Best-Selling Author of Cold War Thrillers, Dies at 89