Herod.
It records that 818 went to 32 MU at Hurn on 16 Jul 61 for modifications to a tanker
A fair number of Valiants were 'modified' as tankers. The fuelling and fuel delivery system was modified so that if a probe was fitted to the stub then all tanks could be refuelled from the probe. With this came the ability to pump underwing, forward. transfer and bomb bay tank, if fitted, fuel to a central point in the bomb bay. The obvious clue is the pipe housing that wraps around the cockpit so the fuel line does not go through the pressure cabin.
We picked up a 543 Sqn Valiant in about 1963 and it was on the line as a tanker within a week.
The Victor's did go through the cabin and one day the pipe sprang a leak. The crew found themselves up to their backsides in fuel so they went to emergency oxygen and flew it back. They tried to warn the ground crew about it but were unsuccessful. Somebody opened the door and found themselves staring up at eighteen inches of Avtur.