From '
The Grub Street Dictionary of International Aircraft Nicknames, Variants and Colloquial Terms' by John Horton:
Vicky Ten - RAF Speak for the beautiful BAC (Vickers) VC10, along with the Big White Bird, and in more recent years Skoda as the original C1 transports have begun to show their age.
The 'Iron Duck' nickname wasn't in there, but, as mentioned before, I suspect (know) that this was from the earlier BOAC 707/VC10 rivalry days. I know at least one VC10 pilot also referred to it as such:
The aircraft I didn’t want to fly. He also explains in this story why he had mixed feelings about his time on the VC10.