Low tension lead
Triumph: TR2, TR3, TR3A, TR4 (1952-62)
Austin Healey: BN1 and BN2 (1953-56)
Land Rover: Early Series II with 1.997 cc (1958) • Series II and early Series IIA with 2.286 cc (1958-64)
MG: MGA (1955-62)
Morris: Minor with 803 cc and 948 cc engines (1952-62)
Austin: A30 (1951-56)
Lucas DM2 and DM2P4 distributor. Variant with screw terminal. Cable length: 7.5 cm
The low tension lead is subject to a lot of vibration. It is not all that unusual for the copper strands to break within the insulation at the connector. To the eye everything looks OK. The ignition circuit can intermittently cut in and out creating frustration and even some danger. If your engine starts cutting out and in or just stops then is OK after you check connections, a broken low tension lead should be among the suspects.
It is a good idea to carry a spare in your field repair kit.