This month I have decided to give to The East Anglian Air Ambulance, whose details can be found here
Each mission costs them £2270, which is quite a lot of money. I have been fortunate, so far, in not needing their services but do see them flying quite a bit. If you want to see just how often they fly, check out this missions
One of the times we were at Old Hunstanton, a yellow helicopter was on top of the cliffs, so it was probably them. It took off before I could get close enough to photograph them.