747 Boy!
Apparently the VA interviews are very relaxed & fun, the assessors are very friendly. Make sure you are very smiley and immaculately presented!!
I haven't actually had an interview with VA but i've been told that you arrive and are given a speech about Virgin Atlantic etc,.. then you are split into groups for a group task, where the asessors watch how you perform.
Then the assesors go away and discuss the applicants, they then invite some into a 2-1 interview, but at this point some are sent home and told they have been unsuccessful. The 2-1 interview, is an interview with 2 assessors asking q's like 'why do you want to work for Virgin??' etc etc.....
Sorry I can't provide more info, i'm sure someone else can......
Good Luck!
Linz