All real estate is local, but the UK and US don't compare - in the US it is the owner that pays property taxes vs the tenant paying council tax, for example.
Landlord's insurance in the UK costs a pittance vs what it costs in the US (YMMV by state).
So - the 2% rule (yes it's supposed to be 2% of purchase price, ideally...) and 50% rule (half of your gross rents 'going away') don't follow for the UK.
Also the British government has done all sorts of silly things making it much better to have a Ltd holding your real estate, if you have a mortgage etc. Just... because, I guess.
Now, here's my perspective. If something is too expensive, don't buy it. I've been pondering buying a little place somewhere in the UK for years now, but the time hasn't seemed right. There were bargains in Liverpool, say, a few years ago - so it seemed to me - but of course there are reasons for things to be cheap.
IMHO people who buy when things are expensive are a) just driving the prices up b) getting a bad return and c) can't really be called investors because they may well be losing money. "Oh but I only care about the capital gain"... yeah, well, that's up to you. But effectively you're subsidising your tenant if the place isn't cashflowing after all expenses (inc. tax, maintenance fund).
So then, risk vs reward. Put it into a Ltd and you have accounting expenses. Keep it out and you can't deduct interest on your mortgage (I believe). In a Ltd if the house explodes due to (whatever event that insurance won't cover), the Ltd can go bankrupt and your losses are at least limited - especially if the Ltd has the mortgage. Risk = however much you put in less however much you take out. Outside, same scenario, you can be on the hook for a lot - and your primary residence and other assets are at risk. Is it worth it for £50, 100 a month? Sure you get a house free and clear in 25 years but does that matter to you?
Lots to think about, work through, type out and evaluate. I'm not saying don't do it, I'm saying make sure you've really thought through all cases as much as you can.