After today's tumultuous announcement, plus the aircraft shown in the still title frame, now looks like a good opportunity to post this run-through of LHR s history...
(the Tudor) had many new systems
Not ones that worked very well, acc to Star Dust Falling. The pressurisation and heating regularly failed, necessitating dropping to a few thousand feet to avoid freezing and suffocating the occupants and there is suspicion that at least one of the disappearances of the Tudors was due to the heater. Want me to OCR and post the relevant pages from Star Dust Falling?
Just found this on the relevant Wikipedia page, from BSAA's chief pilot and manager of operations, Gordon Store: "The Tudor was built like a battleship. It was noisy, I had no confidence in its engines and its systems were hopeless. The Americans were fifty years ahead of us in systems engineering. All the hydraulics, the air conditioning equipment and the recircling [sic] fans were crammed together underneath the floor without any thought. There were fuel-burning heaters that would never work; we had the floorboards up in flight again and again"