Complex sentence: The'Clans' had a mixed reception when first introduced to British Railways locomotive crews due to the fact that there were only ten locomotives in a class that was mostly confined to the North West of the railway network.
Split into simpler sentences: The'Clans' had a mixed reception when first introduced to British Railways locomotive crews. This was compounded by the fact that there were only ten locomotives in a class that was mostly confined to the North West of the railway network.