TEMP0+TSRAGR
sorry but you are wrong - it is the P2 (Non Handling pilot) who starts the engines and the P1 (handling pilot) who manages the show including taxiing the aircraft and performing the take-off. There are only 2 handovers of control on a standard sector - 10 min before TOD and again at some point prior to landing (but no later than DA).
STRESSFREE - it isn't "CRAP" BA have the "Captain" who is in charge of the aeroplane (aircraft commander) and "P1" who runs the sector (operating piot).
To both of you: I know this to be the case as I teach the SOP to BA pilots! I also have a brother in the company - first hand knowledge. Not sure where you chaps get your info from.