One could easily say exactly the same about either Wildcat variant or Merlin 2, so steady there...
I heard £2m per airframe, not sure about the planned exit date of Pu2, but I heard Eurocopter are content the airframe is a simble box and really isn't subject to fatigue, so potentially, like most MOD aircraft, I expect it will have every last drop of life squeezed from it before they finally retire them.