Pros
The London office is probably the most enjoyable globally. Drinks every other Thursday and a good atmosphere in the office. Employees are mostly left to decide exactly how and when to work, including wfh although the office is usually busy. It's a nice place to be and people are friendly. Pay is good and there's plenty of opportunity to travel but no compulsion to do so. There's a lot of autonomy given to individuals in terms of what to work on and how it gets done. Work life balance on the commercial side of the business is very good for most people. Less so in advisory.
Cons
Decision making can be challenging given flat structure. Processes and information are rarely standardised and there is generally resistance to attempts to centralise. Given the high level of individual autonomy people simply won't do things if they don't want to.