Tourette’s syndrome is an incurable condition, external that causes someone to make sudden, repetitive sounds or movements, known as tics.
Mr Davidson, now 54, is credited as the person who introduced it to many people through a series of documentaries, beginning with John’s Not Mad in 1989.
He was later appointed MBE for his campaigning.
The comedy-drama film by Kirk Jones also features Maxine Peake, Shirley Henderson and Peter Mullan.
While speaking to BBC Radio Humberside, Aramayo praised his colleagues and described them as “incredible actors”.
He said there were “pinch yourself moments” while working with “legends”.
“It was intimidating but also the focus was on telling the best story that we could and that’s why they’re all amazing at what they do,” the actor added.