Hoverman - the "dome" description was my attempt to define one perception of the physical area covered under the 1500' rule : the one that holds that you cannot be within 1500' of any part of the congested area. So if your house was on the very edge of this area, you cannot approach within 1500' of it at any height, angle or direction. (Sounds even worse when I try to explain it!)
I will have a word with my man, but as he describes the Enforcement Section as a bunch of a-h@les, don't hold your breath!
FL - you have apparently had a few run-ins with the CAA! For my benefit as a newcomer to PPRUNE, and any other like me, have you been involved with any cases of this kind - i.e. landing on the edge of congested areas? If so, what was the CAA's stance, what was your stance and what was the result?