You're right he might have regulations issues, however, he's had 4 old hidden cameras for years. Its his choice really. I'm just adding 6 more cameras to his system.
What i was looking at initially was the "ESP Quest 14m PIR" http://www.securitywarehouse.co.uk/catalog/index.php?main_page=product_info&cPath=36_37&products_id=1554
Would I be able to gut that device and fit all my components inside ?
A