He appeared in several follow-up documentaries as he grew up, and his story has been adapted into the film I Swear.
Robert Aramayo stars as Davidson and won Best Actor at the BAFTAs last night, beating out Timothée Chalamet, Leonardo DiCaprio, Ethan Hawke and Michael B Jordan.
Davidson went on to be honoured with an MBE in 2019, and due to his nerves exacerbating his tics, he swore in front of the late Queen Elizabeth II.
He told the BBC: “I began ticcing and shouting and I was absolutely mortified.
“But then I felt a hand on my shoulder. It was one of the Royal Archers, the Queen’s bodyguards while she’s in Holyrood, and a voice said ‘Don’t stress, she knows all about your condition’.