After applying for the role via the career page I was contacted soon after to have a quick chat with the recruiter about the role.
This lead to a 30 minute phone call with the test lead to talk through experience, knowledge and reasons for choosing Booking as a career move.
Final phase was a one hour practical and 2 hour competency based interview at the Booking offices.
Overall I though the interview process was very good. There was some repetition across the phone interview and on site, but this is to be expected when hiring for roles like this.