sentences:  However, this period was characterised by large contracts and rushes of work, interspersed with periods of relative idleness and layoffs.The works kept going by refurbishing ex-Southern Region slam-door stock.In 1997 a contract was received to supply the new Class 168 "Clubman" DMU, which led to the various "Turbostar" DMUs and "Electrostar" EMUs, now the most widely used trains in Britain.