Australian Marinas had the same opening quarterlights as the UK Mk1 Marinas. However, it sounds like most UK Marinas had the fixed quarterlights. The Mk1 had triangular quarterlights, whereas the Mk3 had the "kick up" at the leading corner (for the door mirror iirc). I have a couple of Mk3 rubbers amongst the stuff I bought off Ben.
All the Mk1 wagons and commercials I've seen in NZ had fixed quarterlights. Don't know whether the NZ Mk2 has opening or fixed quarterlights.
You can see the difference between the Mk1 and Mk3 in these photos.
Mk1 opening quarterlights
Mk1 fixed quarterlights
Mk3 opening quarterlights
Mk1 opening quarterlights
Mk1 fixed quarterlights
Mk3 opening quarterlights