On the class/path a: it depends where you are in the UK. In the north, it tends to be the flat a, in the south it tends to be the broad a. There's a lot of variation in accent within the UK, to the point that you can identify pretty accurately where someone is from using something this quiz: https://www.nytimes.com/interactive/2019/02/15/upshot/british-irish-dialect-quiz.html.

Anecdotally, I think it is becoming a bit more uniform than it used to be, due to people moving around more than they did historically, though