I applied via the online system. Form was straightforward and easy to follow. Was invited to take online tests. These included a verbal and numerical tests. Both were not too difficult, although some prior practice is recommended. After passing the tests, I was invited for a telephone interview. Although the e-mail stated that the interview would take 30-40 minutes, when Mars called they told me it would only last 15-20 minutes. This surprised me, and the interview was indeed extremely short. It is difficult to show much of your character and abilities in three short questions! I did not pass the interview stage, I think because I had prepared for an interview that would go into sufficient detail whereas it probably would have been more profitable to focus on sounding excited about the company and giving off a generally positive attitude. I would recommend candidates to prepare for the need to shine in very few minutes!