The process took 3 weeks. I interviewed at IPD (City of London, England) in Jan 2009
Interview
people are very nice and procedure was very straight forward, they give you a test to see how you would interpret their reports and some calculation test which is pretty simple and that is it.
Interview questions [1]
Question 1
most unexpected was they give you a benchmark report, which is a product they produce for clients... and then ask you questions about it to see if you have a feeling for figures