The construction of a new link line between the two railway routes at Bicester has resulted in ballast trains working down from Crewe to supply materials to the site. The loaded train runs during the night, but the empties return from Bicester in daylight. 47727 Rebecca passes through the short cutting at Islip on 11 September 2013 with the 6T99 09:31 Bicester London Road to Hinksey ballast empties. 66849, which is on the rear of the train, would later work the empties back to Crewe as the 6M52 16:21 Hinksey to Crewe.