Non-PC Plod -
Sure they werent operating Cat "A", but I guess there werent any fare-paying pasengers on board!
Technically, there was. The medical staff are classed as passengers and the "fare-payers" would be the Charity who hire the AOC operator (in this case PDG) to provide this (CAT) service.
Cat "A" not required (but surely attainable and the relevant profile flown to this LS) due to this being a HEMS landing site, performance exemptions apply.
Same goes for the Berwick centre landing site, only requirement for 2D landing area - provided it had been classed as a HEMS job by the relevant medical authorities.