Have to say if you want a good surf re Viscount past & present have a look here:
Vickers Viscount Network - A Virtual Museum dedicated to the Vickers-Armstrongs VC2 Viscount
and the book of all books:
The Vickers Viscount by Rayner GC Kittle, publisher Air Britain.
(ISBN 978-0-85130-401-4)
PFR