Company operates ATRs which are CATII manual landings. Hence CATII+M is allowed on all types, altough strongly discouraged (=considered stupid) when operationally not necessary. Special FC training is required for CATII+M, but RVR minima remain the same as for CATII+A.
A typical scenario would be landing at CAT II only airport elevated above autoland limit (some machines are restricted to 2500 ft p.a.). Second option is CAT II approach with x-wind above 20 kt, but with 300 RVR, that sound like a too much of a stunt to me.