I am not sure my DDs experience could be described as Grammar school envy....
I think thesandwich has it about right. Bristol have gone down the track of centralising their welfare, so great if you self present. However they lack first line support. Several courses, including DDs, do not offer tutors in the year, whilst other tutors dont seem to be proactive in following up on non attendance. They withdrew wardens from halls, and centralised the accommodation office. They did propose withdrawing senior residents, ie postgraduate students who take on a bit if a welfare role in exchange for cheap accommodation, but changed their minds following student protest.
What they have therefore is a deluxe service for those who self present, but very little to catch others, who start to be overwhelmed by: being away from home; difficult flatmates; money problems; academic problems; problems related to too much partying and the easy availability of drugs, a health crisis (Bristol University's health service is not efficient) or something happening at home.
The standard MN response is that kids who struggle are in some was Billy-no-mates who would have problems elsewhere. But certainly our experience was that LSE offered a much better first line support in the form of tutors and checking attendence, and friends with kids at Bristol have said similar about Durham and York.
If your DC is reasonably straight forward be prepared to remain fairly hands on in listening to issues and helping the student to work out ways to resolve them. Do not expect much from the University until they really qualify for central welfare support.
DDs first year was a nightmare, a sort of Lord of the Flies enacted in a student flat of 12. She got through it and now loves the City, but still feels the University should do something about drugs in halls. She got through it largely unscathed, though it took a year of sharing with nice calm people to regain her self confidence. The undesired karma is that the alpha, albeit immature, characters in her flat who prioritised drugs over University attendance are almost certainly more damaged by the lack of local welfare provision.
Her advice, assuming OPs DC is there to study rather than party, would be Clifton, then City Centre halls over Stokey B. Stoke Bishop is remote, so there is little escape. It's much easier elsewhere, if things prove too much, to disappear to the library or meet up with friends.