In reply to deugar:
Just seen your reply.
Thank you for the information.
I also wondered about the Garde de Bordon, but I could not find anything in the Lindsay Griffin guides.
It looks as if you could slog up straight from Zinal up a couloir with a stream, and thereby get onto the north northwest ridge. After that either traverse across to the aforementioned Col de La Le, or come some way down the south west ridge, peeling off down either side before the end.