I fly a drone for fun (a DJI Spark) and I really hope they do find the people who did it, and give them a long sentence for the problems they caused, but now the pilots seemed to have left the area I'm unsure how the police have any chance of doing so.
Unfortunately as Alister points out, the only people this will affect are people like me who fly for fun, and do stay within the laws. I have no doubt there will be calls for bans and restrictions, but as you can build a drone with a PiZero as its brains, I can't see how a determined adversary would be put off by such a ban on off the shelf products, like DJI kit, that already have GPS Geofencing built in to prevent this sort of thing happening. Another option is the bad guys buy the parts in France and come back through the tunnel, or ferry so evading any UK requirements.
BALPA are calling for the exclusion zone to be increased from 1KM to 5KM, licences for pilots and to fit something that transmits a signal to ATC, but as the bad guys here are already ignoring the 1KM zone, and ignoring Air Navigation Orders then why does anyone expect they will suddenly respect the 5KM zone, get a traceable license or bother fitting and registering a transponder.
There should be something done to try and prevent this in the future, but a knee jerk reaction probably only serve to restrict the already law abiding hobby fliers while the criminal element just wont care.