> Some stations will also insist on prepayment at certain times of the day.

I'm not saying that this doesn't happen but in nearly 20 years of driving around the UK I've yet to encounter it.

I’ve only driven in maybe a dozen countries, but so far the US is the only one where the pre-payment thing existed. I was glad to have read about it in trip prep, or I would have stood there staring at a non-functioning gas pump for far too long!