Lackenby Sidings are still in regular use, receiving steel slabs from Scunthorpe which are rolled into structural steel (beams, columns) for use in construction.
Although the Redcar Blast Furnaces shut down, along with the Basic Oxygen Steelmaking (BOS) plant at Lackenby, the nearby Teesside Beam Mill remained open.
Lackenby "Grids" where trains arrive and depart:
https://www.flickr.com/photos/12a_kingmoor_klickr/27815441104/
Shunting within the steelworks:
https://www.flickr.com/photos/46120187@N08/26714753495/
Some info on British Steel's Teesside Beam Mill:
https://britishsteel.co.uk/news/tee...-60th-anniversary-by-investing-in-the-future/
There's a good book "Teesside Cast Products" covering the former internal railway operations of the Redcar / Lackenby complex, plus the internal link to Tees Dock, published by the Industrial Railway Society:
https://irsshop.co.uk/tcp