Originally Posted by
SchmeckFlyer
In any case, important or not, planning one's diary in a way that allows less than 35 minutes to get from ground transport to gate, especially at an airport as massive as LHR, is completely naïve and unworkable.
Nobody plans to be at an airport 35 minutes before departure - I plan to be their 1 hour in advance, and maybe 1 1/2 hours at LHR. But then, there is the day where my meeting runs 10 minutes longer than planned, the taxi gets stuck in traffic and I just miss the HEX, and there you go - without planning it, I am at security only 30 minutes before departure. I cannot afford to build in even more buffer than that, as it would make day trips quite infeasible.
Now why should I automatically be offloaded? I don't need a visa and I have printed my online BP with a seat number. Usually gates will close probably 10-15 minutes before departure. So, unless my plane is on the gate furthest away in T5B, I have a high chance of making the flight, without holding anyone up.