"Nick" wrote:

When should I stop feeding my Gold fish? Everytime I walk past the pond,
they surface and watch me, expecting food. At this time of year there can be
very few flies, grubs etc for them to eat. I live in suburban London. The
average air temp is around 10 to 12 deg C

When the food stops being eaten immediately. Any food fed needs to be
totally consumed within a few (like 5) minutes.