As far as the chelmsford? location? for ARU, check into the crime, I think it was a bit higher than Cambridge, so look into crime when you check any city you are about to move to.
If you follow the news day to day of the place you are looking at that should give you a gist of what to expect. That is what my kid looked at, her idea.
Also she asked the schools if they were going to train her in what she wanted, and many said no, only the study of vs. the practice of, so she was very clear about what the curriculum would give her and she picked her UCAS options based on that, she wanted Conservatory schools and we did do a separate trip cause her sibling is in another UK school, but they did not offer accommodations (you had to literally rent a flat in the city, and that in just outside London was very pricey!) She would have had a very complex situation. (as it is she has no catering or maid, so she has to clean her en suite and cook for herself, unlike her sibling who got maid and catered.)
But some of the people who did not research their curriculum as well were surprised and left. (maybe two people at best that she knew anyway.)
So make sure you know what curriculum you are getting and if the place is up to your need for safety.