Friendly and open staff, seems to be a generally good place to work.
First interview was a coding challenge (HackerRank), I then had an HR video call followed by an on-site interview. The on-site interview took an entire day and included group work with other candidates, attendance to a presentation on their graduate programme and two interviews: a technical, whiteboard one and an HR one.
As opposed to standard practice, Skyscanner offered honest and relevant feedback when they decided not to give an offer.