999 Air Ambulance - keep guessing - see Description below 

This video was filmed in New Milton in Hampshire!
So why is it not the HIOWAA?
HIOWAA was busy so Dorset took on the job!
Why is it not the Dorset liveried AA?
I hope that Dorset & Somerset Air Ambulance does not mind me spilling the beans BUT - here from their Facebook page is the answer.
Those of you with beady eyes will have noticed that we are currently flying a different colour AW169 helicopter.
G-MGPS (aka Nemo) arrived on Friday to replace G-PICU, which has gone off for maintenance.
This has no impact on the service we provide; it’s the same aircraft model as Peggy and G-PICU and the same amazing critical care team saving lives, 365 days a year!
Thank you Dorset for helping us in New Milton, Hampshire.
Not only did they send us the AA but also their fast car was with us as well.