I beg your pardon!
one of the Hot & High routes Vickers mistakenly saw as the market gap filled by the VC10.
I flew this route for 6 years. The VC10 filled the slot admirably. On that route, it way outperformed the 707 and was actually designed for that operation. But the very design features that made it so good hot and high meant the general operation was not so efficient. The limited set of routes operated did mean that the order book was small as a result. Your statement was wrong. It waas filed by the VC10. Sadly it could not fill the other requirements quite as well as the 707.