The Valiant's towbar was attached to the forward fuselage, not the nosewheel assembly. This meant that somebody had to be in the left hand seat to steer it behind a tug. If the tug didn't have 110 volts you had no electrical power to steer it. Then a Houchin power unit had to be plugged in and towed by another tractor alongside the aircraft.
A compass swing required a navigator and co-pilot to be in the cockpit. The co-pilot to steer and call out the landing compass headings and the navigator to adjust the compasses.
When, not if, a Valiant under tow got its nosewheel out of sequence with the tug there were black tyremarks all over the place.