Apply with CV and personal statement to a third part recruitment agency (when I applied the agency was Pertemps but now I think it is Matchtech). The recruitment agency then invites you for an interview and asks a few basic questions such as what do you know about the comany, please provide an example of teamwork / customer service etc.

Really useful, lots of great activities really pushed the boundaries and got the most out of everyone who attended. The face to face interview however was by a really blunt Scottish lady who was very scary and not a friendly person I think she did not fit the face of the company I applied for when going through the assessment centre.