What are these for ?

[Carlisle]

These posts appear to be every mile or so certainly along the northern half of the West Coast Main line

 

[Deepgreen]

Can't see any pictures...

 

[D6975]

I can

 

[skyhigh]

I can

It wasn't there originally.

 

[Carlisle]

It wasn't there originally.

True I messed up my original post .

 

[Sultan1056]

They are NTP (National Telecommunications Plan) cable termination boxes.
AFAIK it dates from the 1970’s. A composite cable consisting of copper cable pairs for local telecom circuits and co-axial cable carrying the now redundant 4Mhz transmission network.

 

[Carlisle]

Thanks very much for your explanation, they didn’t look like they’d been used for anything recently.