In Great Britain , National Rail is the trading name licensed for use by the Association of Train Operating Companies ( ATOC ) , an unincorporated association whose membership consists of the passenger train operating companies ( TOCs ) of Great Britain that run the passenger services previously provided by the British Railways Board , from 1965 using the brand name British Rail ) .
National Rail is a title used by the Association of Train Operating Companies . ATOC is an unincorporated association whose membership consists of the passenger train companies of Great Britain which now run the passenger services previously provided by the British Railways Board ( from 1965 the Board used the title British Rail ) .