5 Bed House Wanted in Luton Area

I am part of a group currently going though training in the north of England and will be moving down to the Luton area in December. There are 5 of us in the group who will be working at the airport and we are looking for a place where we can live together, our rental period will be at least 15 months. We would like a place with rent from £450 - £550, with posibility of going higher. Preferably with parking, furnished and at least one En-suit. I understand this is asking quite a lot, but any response of a place or recommendations would be appreciated.