Wessex XS875 ended its flying days on the SAR Flight on Ark Royal in September 1974 when it suffered an engine surge on take off, crashed on the port waist catapult bridle arrest ramp and fell into the sea when the tail broke off.
Wasp XT434 had a happier life and is still extant as G-CGGK.
Source: Lee Howard's book "Fleet Air Arm Helicopters Since 1943"