Hi Richard,
I’ll bow to your depth of knowledge on all things electrical but........
In addition to my bulb holder stamped L794/L795 it is also stamped L691/L692.
The lense is stamped L794 with reflector and not a ring type refraction (is that right?) as shown above
My car is a 2006 build so have I misunderstood?
The two different shape lens will fit either holder Geof which probably explains the markings. If you fit an L691 lens to replace the deeper L794 you have to ditch the reflector within the holder. Don't ask how I know

For this reason the rear lights don't have reflectors although I managed to cut down some spare ones to fit rear indicators using a Dremel.
The Classics parts book 2006 - 2014 does indicate (pun?) that front lights use L691 lens but if you have the L794 ones allowing reflector I woud regard it as a bonus.