Pros
It’s in central London, that’s the only perk I can think of.
Cons
Absolutely awful culture, very much a boys club. Seniors and even some partners would speak horribly about people behind their back and if you weren’t in their inner circle you had virtually no support and it’s clear that prospects of moving up are low without that. Budgets for accounts work are impossible to keep to and clients are severely undercharged, meaning partners and managers will always have a go at you for when you inevitably go over budget. This also encouraged a culture of being unable to ask for help or ask questions as whoever helped you would add their time to the client, forcing you to go even further over budget - causing upper management to have a go at you. Not a good environment for training or developing you skills.