to make sure that you have smoke alarms, fire blankets, and extinguishers. We had the first two, but the fire started at almost ceiling height, so my attempting to flap the fire blanket upwards at it was of course ineffectual. And I had to give up on that idea pretty much immediately, as the heat, flames, and acrid black smoke were intense, and the flaming, dripping, melted plastic would have probably left me with some fairly serious burns. Thankfully I managed to quash my instinct to fill a bucket of water and fling it upwards at the flames, as that wouldn't have been great with an electrical fire.
This happened in the space of a few minutes by the way. I left the house, put a bag of rubbish in the wheely bin, chatted with a neighbour and was back in house about three minutes after I left it. In that time a fire had not only started but reached a point where I couldn't possibly manage it safely myself, so had no choice but to call 999. Thankfully the Fire Service arrived very quickly and were absolutely amazing. But it was still a really bloody frightening experience.
So I know it goes without saying, but please, please check your fire alarms and make sure that you have fire blankets and extinguishers. We were lucky, one room was wrecked but it could have been worse. And while we do have smoke and heat detectors, the speed with which the fire took hold, and how toxic and acrid the smoke was, was genuinely terrifying.