Opportunity to get one over on LHR, they'd need to re-design much of LHR to give sterile areas across T5/4/3/2 or allow one group to have a competitive advantage. MAN would need to do this properly though, no silly cheapo half measures.
Would be very difficult at Heathrow if all carriers wanted to use the facilities, think Ringway could be way ahead on this one.
pre Clearance
If you read the DHS press release it is clear that negotiations with national governments are still to take place. This will not be a quick process...the UK government doesn't like non-UK forces wandering around on our soil with guns...
Was under the impression that the pre-clearance staff would not be armed. Are they armed in Ireland?
Get rid of APD, now that would be a game changer.
Indeed!