Thanks for the tag
Firstly, you obviously have great grades! Well done
I'm glad you're feeling confident with the LNAT.
Right now, Oxford, KCL and QMUL are all good choices. You hopefully shouldn't have an issue with QMUL, as long as your PS is up to scratch. Obviously with quite a few people taking gap years this year and applying for this UCAS cycle, nothing is guaranteed and there may be a bit of extra competition. Nothing can be guessed right now, but it's worth keeping that in mind.
Durham, Bristol and LSE are all amazing choices! You seem to be more keen on Durham than the others. Also, the negative stereotype of Durham being for Oxbridge-rejects has always annoyed me. Even if that's true, surely it would show Durham in a more positive light? Those applying for Oxbridge tend to be hard-workers and smart...
Bristol has a good night life, but I wouldn't call it a 'party university'! It's perfectly respectable, especially for Law.
Don't apply for LSE if you don't want to. You'll be paying so much money and LSE is quite intense and there are a few 'negatives' mainly around teaching quality, so if you don't want to apply then don't! Imo you should stick with Bristol and Durham.
I'm not sure about career prospects and things like that, but I can't imagine that they're too different among the three universities.
In terms of course structure, you should look for yourself and see what you like. Imo LSE optional modules seem quite interesting, but not much more so than Durham's and Bristol's.
Regardless, I think you should definitely stick to your original three choices! Good luck.