Hi Flyingfletch
I went for an interview with them last year for Gatwick and it was the easiest interview I have been too.
They tell you about the company, then you do a test which consists of 24hr clock, capital cities, airport codes etc. We then did a group exercise wher they gave you a pax list and you had to seat them on the aircraft.
After that you have a brief 1-2-1 interview and that's that. I have to say though I have worked the last eight years with four different airlines which is why I may have found it easier....but as the other guys have said as long as you have a head..you're in!!!
Good luck