Anyway, back to the subject..
It appears that MAGPAS have a helicopter:
Magpas Helimedix fly to cardiac arrest near St Neots……11th May, 2012…… | Magpas
Looks like a PAS Bolkow, I wonder who is tasking it? Not much on their website, you would think that they would be shouting from the rooftops
A little more here:
News - Local News: What's Happening In And Around Huntingdon, Godmanchester, Hartford, Hinchingbrooke & the surrounding area. (PE29)
Very odd