CurlewKate
I remember the Ralph Lauren advertisement one appearing.
Unusually for me, I don’t remember it.
You're right - it is very Ralph Lauren. Although my first thought was a cross between a scene from a 1980s sex & shopping novel and a Gainsborough.
Diana looks very good (the hair was "of its time" as they say) in riding boots and jodhpurs despite the fact she didn't ride.