The leaked document has left Downing Street embarrassed as it shows secret plans for Tony Blairs final days in office.
The memo was drawn up by Philip Gould and at least three other members of Mr Blairs closest aides, and recommended that the prime minister seek invitations from various light entertainment TV and radio programmes on the eve of his departure.
The information leaked to the Daily Mirror did not give any exact date set for Blairs departure but told that “time is not an unlimited commodity.”
Downing Street confirmed the authenticity of the document but said neither the prime minister, nor any senior Downing Street staff had seen its contents.
Blairs official spokesman said, “What he is interested in is substance, not image. What he is interested in is examining the issues.
“He knows people will make up their own minds about him and his record; what he wants to do is get on with addressing the immediate issues and analysing and addressing those issues and developing answers to them.”
Blair last week rejected calls to use this month's Labour Party conference to name a timetable for his departure, and this week it has been revealed that one minister and four government aides are among 17 normally loyal Labour MPs who have written to Blair urging him to quit.
Blair said the resurgent Taliban should not be allowed to turn Afghanistan into a breeding ground for terrorism again.
However, the head of the UK army has warned that British soldiers are only just able to cope with the demands being placed on them.
Speaking after a visit to a children's home in York, Blair said: "This is a terrible tragedy in particular for the families of the servicemen involved.
"It's so important for us to make sure we stand firm in Afghanistan and stop that country being a training ground for the export of terrorism around the world.
"We should be very grateful and very proud of the fact that Britain's armed forces are prepared to stand up to this threat.
"It's very tough for our armed forces at the moment, particularly in Afghanistan where the fighting is very tough and hard, but it is very important.
"We should be very proud and thankful as a country that we have our armed forces."