Long doors came in when the scuttle was moved forward by a couple of inches in order to comply with required space ahead of occupants when air bags were fitted, regardless of whether they were fitted or not.. All C&U* requirements.
My '97, admittedly a +4 still had the rubber sidescreen extensions Tim. I can't remember when the newer style came in.

*Construction & Use


Graham (G4FUJ)

Sold L44FOR 4/4 Giallo Fly
'11 MINI Countryman Cooper D All4
'90 LR 90 SW