One 10 minute phone call followed by an in person interview. Over the phone went well, however, the in-person interview was very lax - they didn't really ask any questions, just discussed the job responsibilities. Made me wonder why it was necessary to come down to London for a 10 minute conversation. I received a job offer which was rescinded a day later. They said they had sent it by mistake. When I asked for feedback on my application I was ignored. All in all they treat candidates very carelessly.