Loss of power and/or cuts out when hot. Idle speed also low when hot.
Drives perfect until hot.
Loss of power is usually when accelerating. After a few seconds it will recover & drive normally.
Will randomly stall at idle or refuse to idle or cut-out at mid rpm.

So far the following have been changed:
Crank sensor (code reader reported no signal)
4 x coils (1 cured bad cold starting - insulation disintergrated, other 3 were corrded)
fuel filter (outlet fuel was very dirty).

Grateful for your ideas/input - even if I have missed something silly!