Battery is OK.
Fuses are OK.
Relays are OK- pulled, no rattles and replaced.
Fuel pump is OK- healthy squirt from the fuel rail.
Found a small split in the breather pipe junction just downstream of the MAF- taped that up like this:
Other air pipes look OK.
Still starts strongly and then dies.
If it were a cam or crank sensor it wouldn't start.
No codes shown except the fuel evap P0443.
May have to resort to AA HomeStart.