The Lancashire and Yorkshire Railway (L&YR) Railmotors consisted of a single class of 18 railmotors. They were of the "0-4-0T locomotive + semi-trailer type". All were inherited by the LMS in 1923, who numbered the locomotives 10600-17 and gave the trailers separate numbers in the coaching stock series. These were the only self-propelled vehicles numbered in the LMS locomotive series rather than the coaching stock series. The first was withdrawn in 1927, and only one survived by nationalisation in 1948. That railmotor, LMS No. 10617, was withdrawn in 1948 without being given a British Railways number. None was preserved.