What Is It?Velofor said maybe it's a kiln...

I have passed this many times it's near the village of Wakerly
Do any off you blippers know what it is?
It's very intriguing isn't it?
Thanks Velofor for your idea
I found this online
This site was Wakerly iron ore Quarries in Northamptonshire and the “towers” are actually Calcining kilns and were believed to have been built by prisoners-of-war during the first world war, around 1918
Calcining Kiln – “A kiln where the heating process got rid of water, volatile substances and sulphur from the raw material ironstone in metal smelting”
It’s reckoned that the kilns were never actually used and the 2 on the right that look ruined were only ever half-built.   The site changed hands several times in the decade of the 1910’s. A railway siding runs just behind these kilns and on site are the ruins of 2 tipping docks ( or tipplers) which I believe used gravity to load the ironstone into the railway wagons. The railway ran between Peterborough and Market Harborough but the ore was destined for Manchester.
What’s unusual is that when the works were closed in the early 1920’s the buildings were left standing when the normal practice at the time would have been to restore the land to how it was before the building, with just the signs of the quarrying remaining. It’s thought that these may be the only surviving kilns of this type in the UK.