Thanks Dave,
I was thinking that perhaps the cabin 'fit' was also different between the two airlines before BSAA was absorbed...but I do not know for sure.
I had wondered if perhaps potential airline customers had a kind of Henry Ford-type choice regarding fixtures and fittings (seat/bed/galley type styles, etc) to begin with and it was only when more airframe conversions were being considered (and the airlines had more experience of what worked in the cabin layout and what didn't) that the changes were introduced. Obviously, the Lancastrian was only ever intended as a stop-gap until the purpose-built airliner types were ready so I wondered if much forward planning had taken place regarding what could be achieved in such a relatively small cabin.
Ed