Gary McKinnon's lawyer said today that he is anxious but hopeful that Home Secretary Theresa May will block his extradition to the United States for hacking into military computers over 10 years ago.
Ms May is set to make a decision tomorrow. Mr McKinnon hopes she will keep promises made in opposition and refuse to hand him over.
David Cameron and Nick Clegg have previously publicly condemned plans to send him to the US.
There has also been a long-running campaign for Mr McKinnon to be allowed to remain in Britain following warnings from medical experts that he could kill himself if sent to the US to face trial.
Mr McKinnon suffers from Asperger's syndrome, a kind of autism.
His lawyer Karen Todner said: "It has been a long 11-year battle to fight this extradition and we wait with anxiety, but hope, that the Home Secretary will uphold the promises previously made by Mr Cameron and Mr Clegg."
Foreign Minister Alistair Burt's admission that the Cameron government has "supported" a survey of attitudes to US drone strikes in Pakistan's tribal areas amounts to a tacit admission of British involvement.