Originally Posted by
yyzvoyageur
I'll bet you have been given the once-over each time, via camera.
In the UK often the customs area is not staffed at all. It's my understanding, though, that they pay attention to passenger manifests and such as well as probably CCTV as you state, and that if they suspect anything they're there in force. They're not really interested in people who have one bottle of beer too many, for instance - that's not worth the money.
Neil