Originally Posted by catandmouse

I've largely felt that obliging connecting passengers to be rescreened is little more than a job-creation exercise which does nothing for security. The structure of Heathrow T5 is such that there is no problem sending connecting passengers to the departures level without going through security (after all that's what happens to UK domestic connections).
To pretend that UK security is better than anyone else's is quick clearly nonsense. It's just different.
It would be perfectly feasible for Heathrow to recognize "secure" from "non-secure" connections, which is exactly the way it happens in most Schengen airports. Connecting from secure airports other than Schengen airports (notably UK and US flights) without being rescreened has been in place for many years.