Less than four years into what at the time was considered was going to be a short lifespan, 144006 passes Milford Junction on 12 May 1990 with the 13:21 York to Sheffield service. Although these units have been the butt of many jokes, and seem to be constantly slated in the national press, they have spent over three decades providing local services on many routes that may well have been axed if they had not been built.