Someone please tell me this is only temporary. Or was I right about the gradients?.
There are some notes about timing freights over the Feeder Relief Line in the Timetable Planning Rules, so draw your own conclusions.
It is planned that freights will normally use the Feeder Relief Line (But note, here these lines are still labelled UFM and DFR.):
Reading Signal T1728 DFR:
Up Trains on the Down Feeder Relief of less than 4400t to be timed to stop here where it would otherwise be necessary to add pathing time approaching Reading.
But, just in case:
Reading Signal T1726 UFM:
Up Trains on the Up Feeder Main of less than 4400t to be timed to stop here where it would otherwise be necessary to add pathing time approaching Reading.
Those two signals are on the slope up into the station, so clearly the gradient is no problem for most trains - better to stop there than to hang about further south, getting in the way. For the heaviest ones it's different. Under "Reading: Adjustment to Sectional Running Time (to be shown approaching this location)" is says:
No additional allowance is to be added to freight schedules over 4400t approaching Reading coming from Oxford Road Jn on the Feeder Relief Line. This is due to the curvature and incline. All additional time to be added as pathing approaching Southcote Jn or Oxford Road Jn or to be added as a dwell in Reading Station.
So evidently they are going to take this route, but not wait at that point. I don't think there is any suggestion they might not start again, just that it would have to be done so slowly it is worth avoiding. The curve, I take it, places a limit on the tractive effort that can safely be applied, and how well force gets distributed along the train. I can't find the posts now, but I'm sure we established that the rise from the feeder box is quite small, and the slope so short, that the average gradient felt by a long train is not that adverse.
The EAS did say for the Easter blockade that the Feeder Lines would open after it. However, there are still a lot of possessions labelled "RSAR" after that, so maybe something down Westbury way will not be properly finished until a bit later.