Pre GT Belfast days, I was called out to fly a Britannia non-stop from Brize to Bahrain with a Tyne engine for a Belfast which had lost an engine over Iran on it's way to Bahrain with a Tyne engine for a Belfast which had lost an engine after take-off en-route to Gan. The two broken Tynes, which were too heavy for a Belfast, were loaded onto our Brit overnight and we returned to Brize the next day - feeling very superior!