I applied online. The process took 3 months. I interviewed at Rolls-Royce (Derby, England) in Oct 2013
Interview
Applications open in August (apply sooner rather than later!); standard form (CV upload, general questions about your interests), numerical and logical tests (make sure you do the practice tests).
Assessment centre call (about 2 months later for me), long day (8:30am to 4:30pm)! Assessed activities including: Personal Presentation, Competency Interview, Group Task, Technical Interview, Numerical Test, Business Writing.
A call within 2 days, which is very nice as we aren't kept hanging for too long!
Interview questions [1]
Question 1
Competency Interview: Along the lines of 'Have you had personal and business relations with someone, and one has influenced the other, and what have you learnt from this'