CSI have been, taken the footprints and there were unfortunately no fingerprints. Police will be coming to speak with myself and my sister (she was getting ready for work, looked out and saw "more than two" people fleeing the scene. I really wish I'd have chased them to at least get a description.
Luckily though, I'd managed to bend the door back and it's as it was besides a small crease which I'll take to see if it can be sorted. Hosed it down and its watertight so not too much damage. Could have been a lot worse if the alarm hadn't have interrupted them. However now I want a more secure alarm than the Laserline Thatcham 1 that's currently in it so may look at the Clifford systems and specify the proximity sensors to try to deter any further attempts of this happening.
