Hmm, this prompted me to look at those on my 'new to me' Mk2 (52 plate).
On the os I have a H7, and on the ns a H1.
Having now seen just how limited / non-existent the space is on the ns I would guess that the H1 was fitted as it might be slightly easier to replace as it only has one wire and could be done with a pair of long nose pliers. Not that I have a pair, yet! Or it could just be 'Italian Electrics'!
Goodness knows how you replace the outer lights!