I think it's unlikely that much/anything will come of it... i've been in plenty of situations where we've caught shoplifters (supermarket, stealing cosmetics and alcohol), and have multi-camera CCTV footage of them, the police will take them away in handcuffs but nothing will happen. We've only had one prosecution in about 3 years, and at the peak, we were having 2 or 3 big shoplifters a day! The police are pretty rubbish, but they probably have better things to be doing than dealing with shoplifting.
At least you're alright though! I once had my arm trapped in a car door (stolen car, no less!) whilst they drove away!
Always makes the day a little more interesting though :)