From the BBC:
"I rang up the county council and I said I think I've found a dinosaur," explained Joe Davis, who works at Rutland Water Nature Reserve.
During landscaping work at the reserve's reservoir in February 2021, he had spotted something odd poking out of the mud.
They concluded it was an ichthyosaur – a type of warm-blooded, air-breathing sea predator not unlike dolphins. They could grow up to 25 metres long and lived between 250 million and 90 million years ago.
Dr Dean Lomax, a palaeontologist from Manchester University, was brought in to lead the excavation effort. He called the discovery "truly unprecedented" and – due to its size and completeness – "one of the greatest finds in British palaeontological history".
I'm mildly disappointed that it's not an actual dragon … but holy shit, that is a very large creature.
Ichthyosaur: Huge fossilised 'sea dragon' found in Rutland reservoir [Jonah Fisher / BBC News]