Vantaggi
Really top notch people work in the UK business. Good diversity, really clever with impressive backgrounds. Nice building in the City with canteen and gym. When I started in 2013 it was great because turnover was low, and people really built their careers there and stayed a long time. They moved around jobs but this gave it a great feel of longevity as a place to work.
Svantaggi
The Swiss home office micro-manages the UK, and when you add this pressure to UK regulatory scrutiny it can be a maze of rules and regulations. Then the worst is when your Swiss bosses don't understand UK rules and you get in trouble with you boss for following UK law. Far too controlled by Switzerland, which allows for little creativity or enablement in London. Also now beset by reorg after reorg so the turnover is too high to get to know people well or build a career there.