One phone interview with HR followed by one phone interview with the manager (high level, not technical) followed by an interview (technical) with manager in person at their office. It took a couple of weeks in total.

I applied via the portal, I had an interview on site in London. I was barely welcomed and the interviewer seemed to view me as an irritation. When it was time for me to ask questions, rather than ask if I had finished he said in an abrupt manner after I asked three questions that he had to leave as he was late for a meeting. I felt I really wasted my time and effort going there, in the cold and rain too!