Dunno about wellies lol.
The only thing we bought extra was a couple of candles and a saucepan. We also are all electric apart from the gas to the boiler. We have a fire for heat if required and can cook in our new saucepan on the chimnea if the electric goes. We should be having a generator arrive today but even though OH paid for 2 day delivery, the email said Wednesday 30th.
Still long time in weather hours before we know for certain.