Henrietta Barnett Sixth Form - 2025

Hi, I'm currently a conditional offer holder for the Henrietta Barnett Sixth Form. I want to take Maths, Further Maths, Economics, and potentially geography or physics as my 4th subject.
I was wondering what the school environment is like, in terms of teaching and university application support, making new friends, drama between people etc. What are the departments for these subjects like? And how do predicted grades work for these subjects (do they tend to underpredict?)? I come from a grammar school, so the pace of teaching and a competitive environment wouldn't really be my top concern. I am a bit of a shy person, so I am quite worried about making new friends and fitting in, when lots of the girls have been in established friend groups since lower years.
Also what are the extra circular opportunities like? I have read about it on the website, but would you be seen as 'neeky' or made fun of for going to clubs at lunch (that is a big thing in my current school). If anyone that knows anything about the school could reply, it would really help! Thank you!

What's the point of doing two Maths A Levels? A vast majority of unis don't recognise A Level Maths and A Level Further Maths as two seperate A Levels either.

Totally wrong - two Maths A levels are actually required for some unis and some degrees.

This is why I said "A vast majority."

This is why I said "A vast majority."