Whilst Barton Wright was at Miles Platting, he designed five new classes of locomotive: an 0-6-0 for goods work, very similar to some being built for the Taff Vale Railway (the Taff Vale Railway L class), was introduced in 1876; an 0-4-4T for local passenger services in 1877; a 4-4-0 for express passenger trains in 1880; and two types of 0-6-2T – one in 1880 with coupled wheels for goods and the second in 1881 with coupled wheels for local passenger services. Two of these, the 4-4-0 and the 0-6-0, were perpetuated by his successor, John Aspinall, with small modifications.