EH-101. VH-71 "Kestrel"
They use the same helo for Search And Rescue in Canada:
SAR CH-149 Cormorant
http://www.sfu.ca/casr/101-ch149.htm
"Cormorants and their British counterparts. Having suffered through a number of groundings, the type is now have severe tail rotor problems. Replacement titanium rotor half hubs are expected to be the cure."
They are already replacing it with the Sikorsky H-92 Superhawk:
http://www.sfu.ca/casr/101-ch148mh.htm
RAF has a varient called "Merlin"