The daughter of a mentally-ill Scot who was shot in prison while facing the death penalty for blasphemy in Pakistan is to make a personal plea to Prime Minister David Cameron to help her father.

Jasmine, the daughter of 70-year-old Mohammed Asghar, will tomorrow(FRI) deliver a petition of nearly 70,000 signatures to 10 Downing Street calling on the Prime Minister to do all he can to bring Mr Asghar home to the UK.

The Edinburgh grandfather, who was jailed in January after writing letters to a number of people claiming to be the Prophet Mohammed, has been in intensive care in hospital since the shooting.

The move follows a meeting with First Minister Alex Salmond yesterday(WED, when the family asked him to urge the Prime Minister to intervene in the case.

His lawyers claimed they could not access details of an official investigation into the shooting, amid the growing calls for his release.

Reprieve said information about the investigation could support arguments that Mr Asghar's sentence is illegal on the grounds of his mental illness.

Mr Asghar suffers from paranoid schizophrenia and was given a death sentence for blasphemy in Pakistan in 2010.

He was shot two weeks ago by a police officer while on death row in Adiala, a maximum-security jail in Rawalpindi.

Kate Higham, an investigator at the charity Reprieve, said: "The fact that the local authorities in Pakistan are unwilling to share any meaningful information about this incident leaves question marks hanging around their commitment to ensuring both accountability and Mr Asghar's ongoing security.

"This is simply unacceptable.

"Mr Asghar is an ageing, seriously ill man who should never have been sentenced in the first place.

"The British Government must redouble its efforts to ensure that Mr Asghar is returned home to his family in Edinburgh, before it's too late."