Hey I'm going for Nat sci this September also and although I'm not a current student I might be able to help
There are so many stream combiantions that I am sure you will be able to pick modules that will suit you. Here is a full list:
https://www.ucl.ac.uk/mathematical-physical-sciences/natural-sciences/core-streams/stream-combinationsI feel like you may be particularly interested in the Physical Chemistry + (Maths & Stats) stream.
You will definitely have lab sessions and I've heard from a student they did happen quite often. Remember it's a STEM degree and you will naturally have lectures almost everyday.
The lecturers I have met so far were really good and just speaking to them I felt they were really good at their job. I specifically remember speaking to a Neuroscience lecturer and she was so lovely and kind she stuck in my mind, but the others are also just as approachable. You will definitely be able to get help from them whenever needed, they do love their subjects and enquiring about something in your lecture will make them happy if anything (at least that's the impression I got from them).
About careers, I remember seeing a pie chart on the Which University website and a ton of people went into business/management/finance. On the UCL website business destinations are also mentioned in the careers overview on the Nat Sci course page.
I don't see exactly why law students would give science students grief? Lol at least no one will bother with me I'll ruin their life
))) natural sciences is great because you can always brag about how research has been done that Nat Sci students are as good chemists, physicist, biologists, etc as students taking single honours, yet we juggle multiple subjects at a time
Can't say if I'll be happy yet but last time I visited I left excited about September. Really wanted to go there, hence results day was so stressful as I was so worried I might not get in!
I'm not sure what the worst thing about UCL is, but the for me the best are the feel of the uni, scholarships and the location.