I'm trying to get to Foxton to see the spoil trains going to Barrington quarry.
Using Realtime Trains web site I can select freight only times for a specified day and plan my visit accordingly.
I've not used this web site before but I will in future.
http://www.realtimetrains.co.uk/search
PS See their "blog" page for details of APS for mobile phones and tablets.
http://blog.realtimetrains.co.uk/