Complex sentence: This company originally had an engine shed at their Milford station on the opposite side of the city from 1847, which was relocated to a site opposite the GWR shed when the LSWR opened their new station in 1859.
Split into simpler sentences: This company originally had an engine shed at their Milford station on the opposite side of the city from 1847. This was relocated to a site opposite the GWR shed when the LSWR opened their new station in 1859.