Before the interview you are required to complete some online assessments which are relatively straight forward. If you are successful, your dedicated recruiter will contract you to update you on the outcome of the tests - I am unsure and not convinced whether they would bother if you were unsuccessful.
Being successful, you will be invited to one of their assessment days at an academy. I was given a good amount of time to prepare for the interview. I prepared and memorised the criteria for their strength based interview approach - however I wouldn't worry about this as on the day I did not feel as though I had to structure my answers around these.
The day will consist of a small group of you, approx 10. You may be asked to introduce yourself to everybody, and at this stage they checked our certificates and passports.
A member of staff then gave us a quick presentation on the day (and reassured us that NOBODY ever has to pay the £20,000 training fee if they decide the scheme is not for them after training). If you give FDM a google, you will find they have been in the news for taking graduates to court, which was the deciding factor in me declining the place.
A member of staff will then break the group of 10 into two small groups. At this point, one group will head off for their interviews, while the other group completes their tests. The tests were all relatively easy, I am unsure on the pass mark however I believe all results are aggregated together for an overall mark, so if you don't do your best on one test, do not worry too much.
The interviews were probably my favourite part of the day. They will have a quick conversation with you, before telling you that the interview is about to start, and you are given about 5 awkwardly worded questions. I would recommend to just reword the questions in your head quickly, as the interviewer will make you aware before that they cannot elaborate or reword the question for you.