The interview process consisted of two 1 on 1 interviews. One with the head of the company and another with the department head. The interview with the head of the company involved talking around my CV and previous experience. Significantly the head of company interview involved a surprise mathematical/finanical awareness test which consisted of about a dozen questions along the lines of "what is the square of 3.5", "what is 1% of 1.78", "what was the close of the ftse 100 yesterday". None of these questions are particularly taxing, but the interviewer tries to talk to you whilst you do them, in order to put you under pressure and see how you respond. I think the idea is that these questions are done 'in your head', but I did some rough workings on the sheet of paper with the questions on. The second interview with the head of department was more focussed on the technical abilities required for the job and seeing how your skills fit the company. The second interview was more informal than the first. I think that for me this was because I was fairly honest about my skill levels and so left it entirely up to the interviewer to decide whether I was what they wanted. As I already had a job when going to the interview I was keen that I would only take/be offered this job if I was a good fit for the role.