Henry Shelford, chief executive of the ADHD UK charity, said “a group of people will be excluded because of this lack of accommodation”.
“It’s different from a child just not being happy about it, because no one likes queuing,” he said.
“When a kid has ADHD, their energy and their focus makes [queuing] just impossible.
“As an adult with ADHD, I can tell you there’s a whole lot of stuff I haven’t done because I can’t face the queuing.
“I have a need to move all the time, and being penned in in that way is very difficult for me as an adult. And it’s near impossible for children and others.”
All visitors to Alton Towers can opt to purchase a “Fastrack” pass to skip the queues, but these start at an extra £35 on top of the ticket price.