The trust has apologised to patients. It said the change was due to a review of services, but that existing patients would continue with treatment.

The toxin, which is often used in cosmetic surgery to treat wrinkles, stops his muscles going into spasm, reducing pain and increasing mobility.

"I wouldn't put him through it if it didn't benefit him, but it does - it's a little bit of discomfort maybe three or four times a year, but the benefit is enormous."

"We do feel as if we've had to fight for everything for Garyn which can be a bit wearing because all we want to do is concentrate on his recovery.

The trust blamed "a review of anaesthetic services" for the confusion but said "patients already receiving botox treatment will continue to get that service".

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