Locked door: Fair enough - but you did attack old, not bold based on, I asume, your guess as to his experience! I did the first part of my career with BA and it always amazed me their predilection for "going their own way" with respect to long standing manufacturer procedures. In that case it bit them badly!
By the by, use of the Override/Jettison Pumps for balancing was an often used procedure in the circuit for base training but then the fuel in tanks was never below 13tons total remaining! What is the current procedure at BA?