I picked LSBU 😋 I really enjoy it here, although mind you a lot of other students don't. I like the days as well, you get 3 days of uni per week and the lectures and seminars are only 2 hours long. So basically it's just 4 hours a day at uni 9:00-1:00. First years get Monday, Wednesday and Thursday (unless this changes by the time you come). There's enough help from professors but trick is that you have to ask for it, a lot of students don't which is why they don't get the help they need.
Also, if you do well enough in first year then you get the chance to apply for Erasmus Project. That's a scheme where you can travel abroad to an EU country, for Psychology the university is partnered with University of Padova in Italy. If I'm being honest, this was the main reason I chose LSBU, I just need to hope they accept my application😅
The social environment here is pretty lively tbh (it's probably the same with UEL too though). The societies and clubs here are decent, I haven't been to enough to tell you for sure. Some societies are pretty hyper but others are dead so it varies depending on who's running them or what the subject of the society is. Facilities here a kinda up to date too, if you do psychology then you'll be working on computers in every Research Methods seminar. The computers do the job but are slow as hell.
I can't remember the pros and cons of UEL, sorry. So yeah, you'll need to research that a bit more and make a decision.
Also little tip if you choose student accommodation at LSBU, go for the building called McLaren House, it's the best out of the options they'll give you 😉