(22 Jan 2022, 10:46 am)Andreos1 wrote Didn't know about the brick works, but makes sense with some of the ponds there.

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Munitions dump! That's similar to the story I heard. 
Mind, the prison was only finished late 70s/early 80s, so that's a long time to leave the spur in place.

I had no idea about brickworks in Durham until I spotted a brick on my house with a claypath brickwork imprint. There were some around Crook Hall, too.