British Rail research department; continuous communication with trains; line obstacle detection; advanced train control projects; Signal Repeating Automatic Warning System (SRAWS); Solid State Interlocking system (SSI); signalling and telegraph liaison; linking token instruments with a radio network; Radio Electronic Token Block (RETB); Integrated Electronic Control Centre (IECC); leaves on the line; safety; d.o.b. 1942-11-01, railway work: 1970-1997, University College London; General Electrical Company; General Signal Ltd; Westinghouse Signal Companies; Belgian Railways; Inverness-Wick; Leamington Spa; Dorchester; York; London Liverpool Street; West Highland line, Oban-Glasgow; Wales; Matlock;