Instrumentation for P.O.P. train tests at Old Dalby and between Crewe and Willesden 30/4/73 - 15/5/73 (IM-IS-153)

The tests were carried out initialy at Old Dalby in preparation for the main line test between Crewe and Willesden. From the last series of pop train tests the EI/1 bogie has been replaced by the EIT/1 bogie. Instrumentation was fitted to the EIT bogie EI/2 bogie swinging...