Looks as though many people were not very well prepared.
http://www.bbc.co.uk/news/uk-england-cumbria-43302735
"snowed in for 6 days and out of food"
"no heating for 3 days"
And other similar reports.
Surely almost anyone should keep food for a couple of weeks ?
Several reports refer to lack of heating from want of coal or logs, It would seem to me that 4 weeks stock should be the absolute minimum, and with at least a weeks worth INDOORS in case severe weather prevents access to outbuildings or to supplies stacked in the open.
More would be prudent, especially in places liable to become cut off.
Although climate change will probably reduce the chances of such events, there are many other eventualities that can affect food or fuel supplies, so supplies are prudent to have even in the absence of another freeze up.
It is not hard for most people to keep a few weeks of food and fuel.
"Installers and owners of emergency diesels must assume that they will have to run for a week or more"