From my memories of working on a coking plant at British steel at Scunthorpe ...the second picture does indeed look like a early coking plant.
The rows of tall narrow doors are the give away ...and the "shed" or it's modern equivalent ("pusher" in more modern parlance)traverse the rails lifting off the doors in turn and the "arm" mentioned by Roy pushing the coke out of the far side towards the awaiting loco and train for transport under the "drenching tower" where the hot coke is quenched .
IF you watch this clip you "may" be able o spot some of the features ???
With the coal over at Ayle near to Alston would there have been any local coking plants ??? (i know that Ayle was mainly anthracite ....was that any use for the production of coke ??? )
Apologies if i am talking out of my backside as this is a bit outside my usual area of limited knowledge :surrender: