table: [['class', 'operator', 'number', 'year built', 'cars per set', 'unit numbers'], ['class 253', 'br western region', '27', '1975 - 1977', '9', '253001 - 253027'], ['class 253', 'br western region', '13', '1978 - 1979', '9', '253028 - 253040'], ['class 253', 'br cross country', '18', '1981 - 1982', '9', '253041 - 253058'], ['class 254', 'br eastern region br scottish region', '32', '1977 - 1979', '10', '254001 - 254032'], ['class 254', 'br eastern region br scottish region', '4', '1982', '10', '254033 - 254037']]
ref: Br Cross Country was the last Operator for Class 253 British Rail
template: [ENT] was the last [ENT] for [ENT]