Ok what is happening? Sounds a nightmare - any reports from on the ground? (or in the air?)
Heathrow Airport has had to shut one of its two runways and says it will take around two hours to reopen it. There are "significant" delays and cancellations.
Gatwick and Stansted airports are open, although fewer aircraft are able to take off. Twenty three flights had to be cancelled and 18 diverted to other airports after Gatwick closed its runway for two hours on Sunday evening.
BBC NEWS | UK | Heavy snow envelops much of UK