It took HR about 6 months from sending off my application to get back to me. From the first correspondence I was asked to attend an assessment centre in Derby the next week. The assessment centre I was placed in was for a Electrical Control Systems which wasn't my background as the role I applied for had been filled, but I was told that if I attended and passed the assessment centre I would be offered a role in something more suitable to my background. I was told not to worry which made me feel a lot more at ease before going. AC consisted of: 1)Initial welcome, 2)Present a prepared presentation about Rolls Royce competencies and what I would add to the role. (Information on this was all given of what to expect and prepare) Competency based questions are asked after the presentation. 3) Group exercise on making paper aeroplanes to a specification. The task is actually about how you work together and act around others rather than how well you do the task itself. 4) Numerical tests, which are EXACTLY the same as what you do online for the application. However this time they are on paper. This is just to prove that you yourself did them and didn't cheat. 5) Technical interview. Top tip: you aren't there in competition with the other candidates, if you do well and pass the assessment centre they will not reject you. They will either give you a role or put you on a reserve list. So work together! They got back to me the next week, I wasn't given an offer as the position I applied for. But was placed on a reserve list for a role that better reflected my background.