A friend of a Bradford teacher left fighting for his life in a Thai hospital after being attacked have written to William Hague for help.

Adam Pickles, a former pupil at Bradford Grammar School, has been left in a coma after brain surgery after he was attacked in the Thai city of Pattya.

Friends and family have raised money for hospital fees of £2,000 a day, and have said his insurer will not pay until the police investigation has been completed – an investigation they have also raised concerns about.

Neil Clappison, a friend of Mr Pickles for 20 years, said he feared the police investigation was not progressing and has written to the Foreign Secretary to ask for a meeting.

Mr Clappison, 42, told the Telegraph & Argus the insurance, through his work as head of English at the Regent’s International School, in Thailand, will not pay out.

He said: “At the moment they are not paying out anything until the full police investigation has finished and they find out what actually happened to Adam.

“The problem with that is there doesn’t seem to be a police investigation – there’s nothing going on at all.”

Friends have said Adam, 40, was left for dead while making his way home after playing pool at a bar.

He was found by a passer-by and rushed to hospital.

His parents have flown from their Leeds home to be at his bedside.

Meanwhile, friends have tried to raise funds to pay for his treatment, as well as the fees to bring Adam, who last year missed the birth of his baby son Benjamin after a motorbike crash left him in a coma, back to the UK, which is expected to cost at least £70,000.

Mr Clappison said: “I strongly believe this shouldn’t be allowed to happen to any UK citizen.”

Mr Clappison said he had spoken to the British Consulate in Bangkok who told him they were only able to provide translations and inquire with the police about their investigation.

But Mr Clappison said: “I’m not prepared to leave it at that, I think there must be something that could be done.

“Surely in this country we don’t leave our citizens to die in situations like this.”

A Foreign Office spokesman told the Telegraph & Argus: “We are aware of the hospitalisation of British national Adam Pickles in Thailand.

“We are providing consular assistance to the family at this difficult time.”

A Facebook page has been set up to help raise the money. Details of how to donate can be found at facebook.com/groups/adampickles or adampickles. blogspot.co.uk.