In 1912 Dick, Kerr & Co.'s Preston factory was considering tendering for a Brazilian contract, and approached the L&YR to use the Bury to Holcombe Brook Line for test purposes at Dick, Kerr's expense. The line from to was electrified with the overhead 3.5 kV DC system; rolling stock was also supplied at their cost. After prolonged trials the trains entered public use on 29 July 1913. The L&YR purchased the equipment and stock on the successful completion of the trials in 1916.
