Jig Peter - Yes, you are quite right, the basic aircraft was the Envoy, and the "posh" version was the Viceroy. Dont know where I got Ensign from! As you say the RAF development of the type was the Oxford, which must have been far and away the most numerous of Airspeed's types.
Warmtoast - after posting some beautiful pics of the Victor protype on another thread you've come up with these lovely mementoes from the days when flying was still a treat. A few years ago Mrs TTN and I got upgraded to business class (or club, or whatever they called it) on an Amsterdam - Heathrow flight. Even so, there was a distinct lack of potted shrimps, free fags and champagne!