Read this short story late eighties — generations of mice dying as they drag a revival casket through snow — they finally get into a house under a shattered dome and, with the help of some droids called "mimes", they regenerate a man named Nicholas. He immediately dons some bit of kit called a "pharaoh mask" and starts updating himself. He realises he's full size "this time" and is in "True Bath", the town.
His life signs are picked up by post humans in orbit and one comes down as a "tourist" to investigate. As she nears, he "sounds" and she is destroyed by nostalgia! This is picked up in a defence space station and robot systems activate. The master program realises a traitor subroutine had allowed this humans revival to occur and destroys it and sends out interceptors to "True Bath", but too late; the man (Nicholas?) is already off through time and alarms begin to resonate.
Any ideas about title/author?
EDIT: more memories popped into my head today. When he escapes it said "he was carolling off through time".
Also as he first revives he spies the robot mime and croaks "my pipe, my drum, my fiddlers three" and then wheezes with laughter.
When he first dons the pharaoh mask its tongue is fully extended, this indicates to him that its data bank is full, as soon as the update starts a friend avatar appears and gives a dire warning.