It seems most of us have pretty much thought this through. Preppingsu asked for the simple, inexpensive ways to deal with powercuts, and I think simplicity is the key. It is certainly my preffered approach. If (big if), it becomes a regular situation my freezers are my concern. I have chest freezers, which are more efficient. So keep the lids shut.They will hold easily for 24 hours unopened. In one of my freezers I keep 10 x 2litre pop bottles that are 3/4 full of water. If the power goes off then 3 of those bottles on the top shelf of the fridge keeps it cool for the day. Remember that cold air sinks. The other bottles lay on the top layer of the freezers. I also chuck a space blanket then an ordinary blanket over each freezer. This works, as we do get more than the odd powercut. They tend to last up to 1/2 an hour. Howevever,as mentioned , we had a 1 week power/water cut some years ago. Fortunately I am the proud owner of a site generator which it is planned for keeping the freezers cold. Although it is capable of powering the house it would be a draw to neighbours. So it can be used an hour at each end of the day to cool the freezers.
Incidentally, the frozen water bottles are a source of emergency water too. Dangerman said that water storage is rather an overkill in the UK. I would disagree. A source of clean water, immediately to hand is a blessing. Back in 1990, when the water went off, my Wife and I were boiling snow. Let me tell you that situation is a pain in the proverbial! If the water went off right now, I would not want to have to go and find a (questionable?) source of the stuff, then have to filter and treat it. I am in the situation that I have at least a week's worth stored, which gives time to filter and treat more water for when the stock runs dry. Incidentally, this Summer has been very, very dry. My back up to my stockpile is my rain catchment system. Normally there is no problem, but this year it ran dry. The brook over the road is my third fallback and even that ran down to a trickle. Powercuts happen in Summer too.
Anyhow, another question asked earlier was cooking. Many preppers have a back-up camping stove and gas. I have this, and the good old Kelly Kettle too! They are brilliant. I use one frequently on overnight fishing trips. It has a cookset thet fits over the top , which is great for warming tins of my favourite Irish Stew!
I am fortunate in that I have two mutifuel stoves in the house, so heating is no problem at all. In fact as I write this it is so warm in here I have had to open some doors!
In three words I can sum up everything I have learned about life: It goes on.
Robert Frost.
Covid 19: After that level of weirdness ,any situation is certainly possible.
Me.