From what I gathered freights will going through P14 to stop between MP334 to MP306 on the DS to enable the reverse. I believe 'Correct me if wrong' that FL, DB & DRS are running in top & tail with additional locos coming on/off at Arpley and Basford Hall while DRS will be on/off at Daventry. Some of these trains are well over 200mtrs+ in length and can go up to near 600mtrs. I believe the US/DS slow points are been done first to allow this, then from around 18th some can go through P14, DS, Longsight DG to Slade Lane Jn both ways.