The last time I got involved in a conversation about cctv I got shot down in flames lol. I do install cctv for a living as well as all types of security systems. Im with MEM62 on this though. In my experience the Police are not at all interested in Home CCTV. I have had some really good images of people committing crimes, so good the Police were interested, but the CPS threw it out. In reality they want a shot of a face that covers most of the screen, which isnt practical. On some occasions if you are having trouble with a neighbour or someone you you know, CCTV evidence is helpful, but only to substantiate something you have witnessed yourself. If its for your bike, good physical protection backed up with an alarm is the best way. The alarm can be connected to a monitoring centre that can give you Police reponse.