By the way, the Bristol Brabazon was not a military aircraft, nor a freighter. It was designed from the outset as a high capacity airliner for trans-Atlantic routes, to a design requirement set by the Brabazon Committee.
It was plauged by engine and propeller gearbox problems and by the time it showed promise, the jet airliner was in the wings, rendering it obsolete.
Though it never flew with a full load of passengers, it did fly with groups of technicians and Bristol employees and their families. It was built at and flown from Filton, where the runway was extended to meet its forecast take-off run, but the extension was never needed, as the Brab became airbourne well within the original available length.
Somewhat off topic, I know. Sorry.