Urgent: Format Of The 2008 British Gas Selection Centre Day,reading Uk

Hi Nairalanders,
   Please i would be attending the 2008 BG recruitment day in Reading, UK early next week. Please i would appreciate it greatly if anybody  in the house can furnish me details on the format,likely questions to expect,role play questions, exercises to be performed on the said day as well as other information needed for success on the said day.
Thanks and regards