If you are coming to the UK from elsewhere, you will no doubt have electrical devices with different plugs. You will need an adaptor. We also use, well, around 230 volts, it varies, so your devices will need to adjust to that if necessary. Double check – if it doesn’t you may fry your equipment.
Here is a good adaptor:
.The top has holes for a variety of other countries.
There is a replaceable fuse. Don’t replace it with a larger fuse just because…
It has the three sockets, including earth, correct sizes and the black insulation bands are there.
We also have the usual razor sockets, and many hotels provide usb charging ports too.