I applied online. The process took 4 weeks. I interviewed at Transport for London (London, England) in Dec 2012
Interview
Online application: CV+Cover Letter+A few competency questions (ie Why TFL, Time when you solved a problem, etc)
Numeracy & Logical Reasoning Test (Around 30mins each)
Telephone Interview: Why TFL, Why specific Scheme, Time when you had to deal with a difficult person, Most difficult project, Time when you put someone before you priorities.