Is anyone studying a Masters in Public Health? I would like to build up a small network, e.g. 3-4 people to meet with and buddy support each other.
I live in North West London

You might not get much luck with this here as people prefer to keep their anonymity (so no one knows who thay are).

Maybe try signing up to this list:
https://www.jiscmail.ac.uk/cgi-bin/webadmin?A0=EVIDENCE-BASED-HEALTH
and you might find some other people interested.