Approach notes

From the southernmost gun emplacement head down the ridge beyond and down to sea level. This is doable with fishing gear apparently, there may be a fisherman's rope in place.

Or maybe cut right from the low searchlight position (big trench marked X in the pic) into the bowl and down to sea level  (unconfirmed).

Or trog down into the Trois Vaux Valley and ab/scramble (unconfirmed) onto the beach before scrambling round to the crags.

Helmets strongly advised - you never know what a tourist will throw off the cliff.