[There not an intruder until they enter the premises] - Good Point, They are of course if uninvited Trespassers; this is a gray area unless you have removed "Implied Right of Access"
[DPA domestic exemption rules have changed, you need to be registered with the DPA to store any images not on your property] - This is an interesting one, I was aware of changes, but when I contacted them regarding domestic CCTV encroaching on the neighbors land slightly, I was informed as long as I had legal CCTV signs i.e. showing the operators of the CCTV and contact details, this would comply with the DPA, but I will contact them again and confirm this. I am also registered with http://www.whoiswatchingme.org/
[How long has the garage control panel been there, purely from a condensation or damp viewpoint] - The Garage is a brick and breeze block one - What I did was place damp course against the wall then wood panel, attach a IP66 compliant metal Box to the wood and installed the Panel in there, it's key locked access and checked regularly.
I will post my full specs for the House Alarm and/or CCTV system if anyone whats it
Thanks
Phil