For children with autism a haircut can be painful, but one barber is on a mission to help reduce the distress.

Photos of James Williams, 27, a barber from Briton Ferry, Neath Port Talbot, went viral after he cut the hair of four-year-old Mason while he lay on the floor watching the news on his phone.

Now people travel up to 150 miles to have Mr Williams cut their child's hair.

He has founded a charity called Autism Barbers Assemble and this weekend he and 11 other barbers will cut the hair of 60 children with autism in a salon outside Cardiff.

But how do you cut the hair of a child with autism?