Originally Posted by
RafKa
The trick with most London airport nowadays is to make sure you have your boarding pass scanned at the entrance to security no later than 30 mins before departure time. This is very strict and a 30 sec delay can result in a missed flight.
Where do you get that from? There is conformance at T5 at LHR at T-35mins with BA and, apparently, Luton is also introducing a similar system. Other airports, however, do not have such rules, AFAIK.
To the OP, the rule means that they COULD refuse to let you board if boarding was finished by that stage. I do not recall, however, boarding being finished that early.