 The research was mainly carried out at the Old Dalby Test Track in Leicestershire and then on the West Coast Main Line (WCML).The WCML tests, between London and Preston, were initially done with the pantograph attached to the top of Lab Coach 6 'Prometheus' during December 1978.After some initial problems with these tests, the pantograph was modified at Derby / Old Dalby but returned to WCML testing in July 1979 between London and Carlisle.