the british rail class 07 diesel locomotive is an off-centre cab dock shunter. they were used in southampton docks, to replace sr usa class steam locomotives. it is a 0-6-0 diesel-electric shunter built by ruston &amp; hornsby in 1962. they were originally numbered d2985-d2998 and later given the tops numbers 07001(d2985)-07013(d2997), d2998.