john, Broken Wings only shows one JP accident in 1971 which resulted in a fatal.
2.3.71: JP T3: XW300: 2nm ESE of Selby, Yorks: Collided with FAA sea Prince WP312and crashed. (2 + 1 RN).
In 1970 there was also only on JP fatal accident.
30.4.70: JP T4: XP566: RAFC: 2nm NW of Cranwell: Flew into the ground during night approach: ( 1 )