Simplify the following text for a Grade 12 native English-speaking person.
Original: Railfreight Distribution was a subsector of British Rail responsible for non-trainload freight operations , as well as Freightliner and Intermodal services .
Simplified: 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 .