One of the reheats on 711 had been disabled due to a fault, but an entry was made in the limitations log and it was allowed to be used for one last sortie
A take off using only No 2 (top) engine in reheat and flaps down was a recipe for disaster as a certain USAF exchange instructor at Colt discovered in 1970. The pitch down moment was such that the nosewheel could not be raised. I hope therefore, if true, that it was the No 2 reheat that was disabled. My recollection of Eric's demolition of the newly resurfaced runway at Wattisham was that both reheats were at full chat