One of the best interviewing processes I've done as it actually assesses skills you require for the job. Only negative aspect was that I was told that the client facing part is something they train on the job but the feedback was that despite passing the scientific side of the interview, I was not confident enough in the client side of things. This contradicted what they told me & they didn't leave any room for the potential of being nervous about the interview.

I had a first round interview online with a senior account manager and senior account executive. It was very casual and friendly. They asked some competency questions but were also keen to get to know me as a person. This lasted about 30 mins I completed some untimed tasks like replying to a client's email, data handling, spelling and grammar checking and basic calculations. These were not very challenging. I had a final round interview in person at their offices in Marylebone with the CEO and Global Accounts Director. This was very much a getting-to-know me chat and very casual conversation. They asked some questions about experience and my interest in the role, but it was mainly to see if I would be a good fit for the company. Personality was the most important thing. Overall a very painless application process.