In 1970 Northern Ireland Railways purchased new Mark 2Bs for the Enterprise train service between Belfast and Dublin. These were initially painted in an attractive maroon and blue livery and worked by maroon BREL-built Hunslet Bo-Bos of the NIR 101 Class. A pale grey livery with a blue stripe below the windows was introduced in the 1980s. This rake included No 547, the only Mark 2B dining car. This carriage was restored in 2008 by the Railway Preservation Society of Ireland (RPSI). The Mark 2B carriages were replaced on the Enterprise service by new carriages built in France by De Dietrich Ferroviaire in 1996.