Sorted,
hopefully. Tried what people advised, and the same happened???
Tracked it down by removing a couple of fuses, ones that I'd installed after the initial loom install.
It was the way I wired up the rear fog, somehow it was keeping the dash etc powered up???
Decided to remove the supply and relay and let it be powered straight from the main beam loom - all seems to work and the engine stops straight away
I don't intend using the rear fog anyway except for IVA - so minimal use.
Thanks for the input, always appreciated.
PS Charging lamp doesn't work but I can live with that??