Funny, heartfelt and emphatically moving, I Swear dramatises the true story of Tourette syndrome campaigner John Davidson and his quest to live normally in a world that insisted on calling him different.

Diagnosed aged 15, John’s Tourette’s made him the target of huge misunderstanding in 1980s Britain, and he faced hostility, bullying and occasionally outright violence for much of his youth. Aged 16, he was the subject of BBC TV documentary John’s Not Mad (a Q.E.D. episode that’s still ranked one of the 50 best British docs in national polls) and subsequently became one of the UK’s most passionate advocates for greater awareness and acceptance of Tourette’s, for which work he received an MBE in 2019.