Tristar 500 is right, I remember seeing the last one being prepared for it's storage flight in the hangar at LHR, cannot remember the reg.
All but the economy seats were being removed, I took a last look at a 747 'classic' cockpit, having being involved with BA 747-136/236 aircraft back in the 80's.
The effects of Sept 11th brought the -236 retirement forward by some 6 months.
Some are flying with a UK based charter company, or were anyway, they commented that the 236's were in superb condition.
That will change for future retired fleets, after our wonderful head of engineering has finished with his running down of facilities at LHR, although he may get his wish of getting Concorde retired early first.
(He's not said that out loud, but we know what the man's agenda is, sadly he's succeeding).