I applied online. The process took 2 months. I interviewed at Vodafone (Newbury, England) in Jan 2013
Interview
The assessment centre is very well run, and the nice touch is that they get current graduate to answer anyquestions you might have prior to assessment, and several are on hand during the day as well. I would make sure you are clear about everything, and ask beforehand about anything you are unsure about such as dress code, activities on the day.
Interview questions [1]
Question 1
There is a very strong expectation that you will have very good knowledge and understanding of their business and services and those of their competitors.