I had a look at this aircraft last year but it is well wrapped up and parked hard against a hedge on somones private property.
Wrecks and relics 27th edition spculates that it may be Sea King HAS.5 XV648 which used to be at Acharacle. I was not able to see any sign of serial number or unit markings.
l think it might be possible to get an answer from Auchengillen Outdoor Centre who are based on the adjacent land.