Just a thought, everything in those photos is for scrap except the two CPWs. The Mk3s, 2700s, 8200s, the 141, the orange 201s are being or have been stripped for parts.
Didn't know the CPWs had screw couplers, thought they had the horse shoe links like the rest of freight stock. Any time I have seen them head down Alexandra Road there is alot of slack between the buffers.