A prisoner with a muscle-wasting condition accused of taking part in a Palestine Action protest claims he has been forced to crawl around the jail – including to get medicine – because of lack of treatment and a wheelchair.

Umer Khalid, who is being held at Wormwood Scrubs in west London, awaiting trial for alleged involvement in last year’s break-in at RAF Brize Norton, also alleges he was left in his cell when the prison was evacuated because of a fire alarm and went 26 days without a shower while waiting for a shower chair to be provided.

“I’m literally on the floor, crawling on my hand, but then I can’t even use my right arm because I’ve fallen on my shoulder multiple times because they’ve not given me a wheelchair, so I can’t even crawl properly.

“I’m not embarrassed because at the end of the day I’m not the one who should be embarrassed, but it’s so dehumanising.”

He claimed he waited weeks to be given crutches, which he is now too weak to use, and then for a wheelchair, which is unsuitable because it does not fit in his cell or in the corridor outside it.

Before he was given the wheelchair, Khalid, who says he is in pain and exhausted, missed appointments with the neurologist and the physio because he could not get to them. He said he has only seen the physio once this year.