From Switzerland to London

Hi everyone,

I will shortly be moving from Switzerland to London. Do you have any advice on all the administrative steps there are, in Switzerland and London? I know I don't have to get any kind of permit to move, both countries having agreements.

Do you also have any recommendations on daily life things, like good neighbourhoods to live in (ideal: central, good housing, cheap), cell phone provider (and plan...), other things I have to look out while moving there?

Thanks a lot!
Cheers,
Evelyne