Derailment of test coach RDB975260 at Kearsney loop junction on 29 July 73 (TM-FT-028)

At 06.55 h on Sunday, 29 July 1973, Research and Development Division Test Coach RDB975260 became derailed while running over a test track situated between Kearsney Loop Junction and Deal Junction at Dover. This derailment was the deliberate culmination of an experiment being carried out by the Research and...