A:AnswerYes as a world traveler I have used seemingly configuration of adaptor in Australia and it worked without any problems. So this will also work.
A:AnswerYes this is the on for many Commonwealth countries using the 3-rectangular-pin plugs with a fuse. However, it does not have a ground/earth line (your electronics do not need one anyway).
A:AnswerNo. You will need a voltage converter. The UK uses a 220v system, meanwhile we use 110v. Your hairdryer will get fried. If it’s any helpful, hotels always have hairdryers and so do air bnb’s