there was recently a power outage to the East block CCTV system. This is the only time I recall there being a problem and to my knowledge it lasted 2 days at most. At the moment we have an issue with the internet upload service that RMG are trying to resolve. However the system is still collecting data. We have had several occurrences where break in activity has been recorded and images have been passed to the Police. I believe this has been discussed in the security section of the forum.
Obviously the CCTV does not cover the whole car-park.
Hope that helps.