All this chat has reminded me that the pulpit in my old church in SE London was on a railway line! The church, built in 1730-something, had been extended by the Victorians at the east end to form a new choir and altar area plus organ loft and Lady Chapel. (Around the 1890s.)
The pulpit was on a pair of rails (possibly 5ft gauge - I never measured it)

It's seen here in its 'Forward' position and could be rolled back by its own length to give a clear view of the east end.
(Taken in 1967 after the church had undergone a major refurbishment - I was singing in the choir at the time but on the side nearest the photographer so can't be seen!)