Tourette syndrome is a motor disorder characterised by sudden, involuntary and repetitive movements or sounds, known as tics.

Tics involving sounds may include:

whistling

sniffing or clearing your throat a lot

making animal sounds

repeating a sound, word or phrase

swearing

About 10% to 30% of people who have the condition produce socially unacceptable words as tics.

Evans said: “It’s really upsetting I feel for for John and Michael B Jordan and Delroy Lindo that the whole evening has sort of been overshadowed by this conversation.

“There must be more education and more understanding about the base-guarding of things like this, and the tics and the language and what comes out.

“Not just for John or those who have the tics, but for those who are on the receiving end of it, because obviously it’s involuntary.”