Slightly OT, but let me tell you about an experience at FCO on Sunday.
I was sitting in the BA lounge, sipping a Peroni, before gathering up my goods and chattels to go on the long and tortuous route to the gate. For those unfamiliar with FCO, this involves traversing two escalators, riding a shuttle train to a distant satellite departure area, and ascending yet another escalator.
The vast majority of the embarking pax managed to navigate their way through this maze - apart from two DYKWIAs who held up the entire flight while feverish efforts were made to locate them, claiming that no announcement had been made in the BA lounge.
Now I understand the need for the 35 minute cut-off at LHR T5.