However Bromley's first class of locomotives were built by Dubs and Kitson with 12 allocated to Stratford and four each to Norwich and Yarmouth sheds. One of these locomotives was later equipped with oil-burning capabilities, but the increasing demands of railway traffic saw these engines withdrawn by 1893 after a relatively short life. Bromley also designed an class which lasted some 24 years in traffic. He also designed the E10 class some of which were fitted with condensing gear and operated over the East London Line to New Cross and East Croydon.