Interesting Nick its either a Mk 2 with a MK 3 grille fitted the change over was on K registration if I remember as my dad had a K reg MK 2 & his friend had a K reg MK 3. I am querying this due to the over riders MK 3 cars didn,t have them fitted they were an option extra not many people paid to have them fitted.
Definitely looks like Mk111 interior and front. Have you ever noticed Mk111 cars (and 2200s)seemed to have what looks like small dents or creases on the curve at the front of the bonnet as though they were possibly deliberately weakened here in an attempt to improve safety - or perhaps the fitting was poor!
The link to the previous sale is only taking me to a small jpg picture and I can't find it on the carandclassic website to amend it.
It looks to be the same car Nick. However it lacks the rear over riders on the latest picture & the door mirrors are missing. The creases in the bonnet are probably due to people pushing on it to close it. Also British Leyland were using cheap imported Spanish steel at this time.