Personally I'd go with:
1) UCL
2) Kings
3) Exeter
4) Bristol
5) ULIP
I think that they all have a decent reputation, except for ULIP, I'd say that people go there more for the experience rather than the academic prestige (that's just my opinion though maybe others would argue differently).
I put UCL and Kings at the top because I know people who studied languages there and adored it! It's in the city, close to France if you ever want to go spend the weekend, has great Year Abroad opportunities.
Exeter and Bristol are similarly incredible, I would say just a tiny bit less but I wouldn't disregard them by any means.
You should also consider what kind of campus you want. City or more campus-y.