He became the Chief Mechanical Engineer of the Lancashire and Yorkshire Railway in 1886. Continuing the work of his predecessor, William Barton Wright, he modernised the locomotive stock and continued Barton Wright's philosophy of standardisation, bringing in several of his own design.[1][4] He was promoted to L&YR general manager in 1899,[2] a position he was to hold until 1919.[4] In this capacity he introduced electrification and greatly expanded the transport of coal.[1]
L&YR Class 5, a class of 270 steam tank locomotives with a 2-4-2T wheel arrangement.
L&YR Class 7, a class of 40 steam passenger locomotives built between 1899 and 1902 with a 4-4-2 wheel arrangement.
L&YR Class 21, class of small 0-4-0ST steam locomotives for shunting duties.
L&YR Class 23, a class of 0-6-0ST steam locomotive used for shunting and for short-trip freight working, originally by William Barton Wright, rebuilt by Aspinall.
L&YR Class 27, a class of 0-6-0 steam locomotive designed for freight work.
L&YR Class 30, a class of 0-8-0 steam locomotives, designed by Aspinall, built under Hoy.