Computer hacker Gary McKinnon has refused to undergo further medical tests by a Home Office-appointed expert as he fights extradition to the US, his mother said yesterday.

Janis Sharp said her son would not have a final psychiatric examination before the Home Secretary decides whether to order his extradition.

The case returns to London's High Court on Tuesday "in anticipation of an imminent decision", his family said. At the last hearing on July 5, judges were told Theresa May was "close" to making a decision.

But she was "concerned" that medical experts instructed by her department had not been permitted to carry out an examination to help her decide whether Mr McKinnon would pose a suicide risk if removed.

His supporters claim Home Office expert Professor Thomas Fahy has no experience in un-covering suicidal tendencies in Asperger syndrome patients.