Hi Sir George.
A cloud base is rarely a completely uniform flat layer. I've found from experience, when doing cat I approaches with a base at 200' one can sometimes fail to see any of the approach lighting system at minimums due to the fact that you may reach minimums in a section of cloud that has a downward bulge. Why raise the possibility having to carry out a missed approach by doing a cat I in such conditions when cat II facilities are there and ready to be used?
Do you know what the Aerodrome Manual and ATC MATS Pt2 have to say with respect to whether or not procedures for protection of cat II/III ils are defined as LVP's? I'm going to see if I can get access to those documents.
Yes, A/P is used and the airport is in Ireland. I'd rather not say what airport but I'll say the cat II DH IS 122 radio....... Although I'm not sure why you ask about these factors given the nature of my query?
Thanks.