Adrian did you get cut off mid thought?
That's odd, may I was moderated
Anyway, as Jays says modern cars have same tub now, but not sure when, Budsters 4/4 however which if I recall correctly is about 10 years old is 1 inch smaller than my +8 at the rear just behind the doors.
The newer tubs like my RoadsterI think are about 1 inch wider at the same point as my 96 +8. If I recall correctly the ash frame now is a standardised build for all tradition Morgans.
The cars can look narrow due to variations in wing width, depending on types of wheels fitted, ie a plus 8 with 16" by 7" wires will have wing 0.5" wider than a +8 with 15" by 6.5" wires, same goes for other cars like a new roadster. I expect Little Red Rosie is slightly narrower than NeilM's with chrome 16" wires.
Hope this helps.
