Two hours interview to test soft skills and technical competency. Asked to prepare technical presentation of project done at the university. Interview took place at the London office. Both interviewers made me feel comfortable as possible considering the circumstance. Lots of questions from both assessor's. However, it was a very interactive session. At the end of the interview, they invited me to lunch with them which I politely declined. At that point to me, it was no brainer to accept their offer over other offers if successful.