Just to clarify two points made earlier in this thread;
1. SiloeSid mentioned the hospital HLS directory (I am assuming he means the RAF one)
Inclusion of a site in this directory does not clear it for legal use by a commercial air ambulance operator.
2. Jellycopter talked about Rule 5 and "saving life"
Nowhere in the current ANO exemptions available to UK HEMS units is there any direct reference to saving life.