Pros
Office in London is reasonably nice and they have some good company benefits.
Cons
If I could rate less than 1/5, I would. HR, or as they call it, ERC department is just plain awful/useless. You're the bad guy if you make a complaint. "We're going to offer you a generous amount of bereavement leave, but if you decide to use it we're going to treat you like some 💩 we just stepped in." Managers are basically allowed to do what they want, and are perfectly allowed to try and derail your career. They can put you in low standing with the company for no justifiable reason, and then even if you want to try and improve yourself, you are no longer allowed the resources to do that. They also misreport your salary to HMRC so that they think you've been paid vast amounts more than they've paid you (i.e. they duplicate monthly entries), and when you email ERC to tell them, they ignore you and ghost you. Meanwhile, the tax man is taking a 4 figure number out your paycheque each month because they don't know any better. And when you finally get hard evidence that you've been subject to constructive dismissal and open up a grievance with the company, they will ignore you and ghost you seemingly in the hope that you will go past the 3 month mark of you leaving, meaning you would be unable to go through an employment tribunal process.