Three Blades: The craft in question was
ZA298:
Westland Sea King HC4 ZA298 of 845 Squadron as seen at Yeovilton on 27th August 1998 (Photo: Chris Lofting)
You may read a little more about 298 here:
Royal Navy Sea King ZA298 will go back to war after being downed by Taliban | Mail Online
I do feel as though the British government have let the services down by allowing the UK's SAR 'experience' to 'escape' the military.
In peactime these operations provide important training and experience for military pilots and possess (in my view) an equally important public relations value for the services overall.