Boyington
As correctly pointed out by tubby linton autopilot/FD is not capable of proper guidance in later part of the approach and that is why it is not approved procedure to use AP or FD for this approach. So you will have to fly raw data once on glide slope and thereby CAT1 minima without credit for FD should be used. Quoted below from FCTM:
Furthermore, the final stages of the approach should be flown using raw data in order to avoid possible excessive roll rates if LOC is still engaged. Indeed, as the autopilot gains are no longer updated with the radio altimeter signal, the AP/FD behaviour may be unsatisfactory when approaching the ground.