All good now!
When the police came over, I explained that I had no expectations of them finding them.
In this case there was no theft, no motive, just a complete assnugget!
Working out a camera solution.
If anyone wants a quick cheap solution, a FOSCAM camera twinned with a PC running 'iSpy' seems like a good choice.
The FOSCAM camera is IP and has built in motion detection and sends an email/SMS when something is spotted. It also allows remote access from browser/phone.
iSpy allows connection to IP cameras to enable a form of continuous recording as well as other features (and its free).