Unless there is heavy snow between now and Sunday, I can't see why the game should not go ahead.
London is cold but most main roads are clear. Travellers should remember that there is no tube on Boxing Day, so cars, taxis and buses are your options.
English - Journey Planner - Transport for London
SAKE ! A bit of bloody snow and the whole country grinds to a halt. It would take about an hour and half and several bus changes to get to Victoria Road from Norf London but I DEMAND that the game is on.