Hi,
Having problems with starting in the mornings. When I turn the
ignition on the preheater lamp is not illuminated on dash and car will
not start. If I switch ingition on and off for a while then go and
make a cuppa when i return and turn on ignition preheater warning
light IS on. Any ideas world.

Yes i had this problem with my 405 found out it was the relay,so after
replaceing relay it is ok also replace the earth wire at same time.