I applied through a recruiter. The process took 3 weeks. I interviewed at Network Rail (Milton Keynes, England) in Sept 2014
Interview
A competency based interview followed by some more job specific questions. Friendly people, one spoke quite a bit of railway tech language which was a little daunting but ultimately didn't stand in the way.
Interview questions [1]
Question 1
Tell us about a time when you've overcome a problem (in communications)