I think you just need to pick a destination and give it a go.
My experience is that Heathrow was awful for me on the several times I tried it, but I know others do well.
Birmingham is not an area I’m interested in but it is a popular touring destination.
Blackburn is one of the most deprived area in the country, so I wouldn’t venture there, personally.
Dewsbury, I was really pleased to have found an apartment, only to discover it had several cameras and only the person renting could stay there.
Hopefully others will have experience of these areas.
Good luck wherever you go!