I applied through an employee referral. The process took 3 months. I interviewed at bp (London, England) in Jun 2018
Interview
Face to face interview with one manager, one architect and an HR person. Interview lasted perhaps two hours, very thorough with many questions focussing more on company values and less on technical aspects.
Interview questions [1]
Question 1
You may get asked about their values and how your previous experience demonstrates their values.