Sorry Ben that it's taken me an age to post this but not getting home much these days.
This is the only photo I've got of the yard prior to redevelopment, all the others are from the canal side.
This picture was taken in 1982 or '83.
I'm pretty sure the track crossed the yard and went between the concrete silo and the metal-clad building.
The building closest to the camara was a sampling lab and weighbridge office. Behind it the building with the pitched asbestos roof was a workshop, probably for the truck fleet.
Behind these buildings, between them and the railway line was a white bungalow which I'm sure Allied Mills used as offices. There was an article about it in the Surrey Herald because somebody of note once lived there, but I can't remember who it was. The bungalow was where the swimming pool and fitness club now stands.
Regards
Steve