It is unlikely that any HEMS operation will be capable of PC1 at the HEMS Operating Site (scene).
All Category A procedures require the surface, size and obstacle environment to be established by survey; PC1 requires that all obstacles be cleared OEI by 35ft -for approach, balked landing, take-off and continued take-off. It is obvious that this is not possible at the HEMS Operating Site.
'Hostile' is absolutely correct that PC2 is the best that can be achieved.
Jim