Complex sentence: Railfreight Distribution was a subsector of British Rail created by the division of the Railfreight sector in 1987, responsible for non-trainload freight operations, as well as Freightliner and Intermodal services.
Split into simpler sentences: Railfreight Distribution was a subsector of British Rail created by the division in 1987 of British Rail's previous Railfreight sector. It was responsible for non-trainload freight operations, as well as Freightliner and Intermodal services.