Nope, 'fraid not. His swansong speech at his last conference included ""If I'm selected I would serve a third term - I do not want to serve a fourth term."
Margaret Beckett said Blair had said he would sand down mid-term, and minutes later on the same program, Peter Hain said Blair had said he would serve the full term. Blair himself, ever the master of the vague answer, said what I quoted above, and not that he would serve part of a third term.
It came as no surprise to anyone that watches politicians that he ducked out part-way thorugh tough, and the Tories certainly used the "Bite Blair, Get Brown" slogan.