Here's a scan of an original Vickers-commissioned artist's impression, from the mid-to-late 1950s, of then as yet uncompleted Vanguard, in flight. Quite a rarity I think and I was very pleased to buy this recently at an aviation fair.
Vanguard, original artist's impression, in flight, from late 1950s e | Flickr - Photo Sharing!
Such a shame the Vanguard came on the scene just as passengers were going mad for jets, stunting its sales to just 43.