The Southbound line towards Oxted was OK for ECS until very early yesterday morning, but I'm not sure what it's like now. In other words, the stock has effectively now been trapped for around 36 hours.
The last ECS move to Selhurst picked up delays of around 25mins passing the site.
I do not believe it is practical to move any 377s - certainly during the day - due to the DC traction current having been isolated. As far as I know, there have just been a couple of 171s to/from Selhurst.