Aries
I THINK Aries I was originally built as a Lancaster and then demilitarised and fitted with streamlined nose and tail fairings similar to those of a Lancastrian. The Lancastrian was not a converted Lancaster but was a new aircraft designed and built as an airliner. Subtle difference.
I've got another feeling - that Aries II was a Lincoln similarly demilitarised and fitted with nose and tail fairings. There never was a an airliner version of the Lincoln although I believe ones was designed - to have been called the Lincolnian.
AV Roe ditched the Lincolnian concept and went straight on to the Tudor (oh dear).
I can check up 'cos my Dad was an Apprentice at AV Roe at one stage and I think will know these things - at least about Aries I and II. He told me that while he was there he heard rumours of the top secret bomber design they were working on. Turned out to be the Shack...