That sort of attitude used to be reserved for the likes of Mr O'Leary (with the odd f-word thrown in).

Again: nobody minds a T-(whatever is reasonable) cut-off time at the gate. If you're late, you're late, and you'll miss the flight. If you miss the deadline for check-in luggage, you go without your bags, or not at all. Fair enough. Arriving at LHR T5 at T-30 on a domestic or EU shorthaul, with PYOBP and a UK or EU passport, only to be automatically offloaded from the flight, is in quite a different league. And blaming BA's LHR delays on late PAX really takes the biscuit.