I’ve heard of them; I don’t think they’re common in the UK these days after being near wiped-out fifty-odd years ago. Never encountered one myself.
Edit: quick check of the news suggests that they are back! Here’s a BBC Radio link: https://www.bbc.co.uk/programmes/p0fsd21z
Another Edit: turns out my other half has met people who’ve been bitten recently. Nasty nasty bite.