Conrgats on getting to the interview stage!
I went to the open day (unluckily didn't get past the application stage though

) and they said it would comprise of team exercises to get to know you and how you work. They didn't go into to much detail but it will probably be an introduce yourself bit, followed by activities like building bridges out of paper and stuff like that. Come Lunch time they'll keep some of you for the interview and say goodbye to others. The interview will probably just contain the usual sort of questions like "why do you want to work for EMT", "name a time when.......".
hope this helps and again congrats
