I am better prepared than some but you are diverting this thread to personal preparation away from the national disgrace which is Heathrow Airport.
Area outside house cleared plus own rock salt. Cars fully fuelled with shovel which I used on Saturday to aid parking. No snow tyres, chains or food & blankets in /on car though but would do food & blankets if travelling out of immediate local habitated area.
How's your preparations ? Is the freezer stocked, alternative heating arrangements.................??