TOPS Class 98 has been used to cover all steam locomotives used on the mainline in Britain , but also has a particular usage for the three Vale of Rheidol Railway-design 2-6-2T locomotives that remained in the ownership of British Rail ( BR ) after the end of mainline steam traction in August 1968 .
TOPS Class 98 has been used to cover all steam locomotives used on the mainline in Britain , but also has a particular usage for the three Vale of Rheidol Railway-design 2-6-2T locomotives that remained in the ownership of British Rail after the end of mainline steam traction in August 1968 .