"Britain's oldest dinosaur that has been entombed in rock for more than 210 million years will finally be excavated, researchers announced today. Thecondontosaurus antiquus is the oldest known dinosaur in Britain and one of the oldest in the world. A rock specimen, discovered at Tytherington Quarry in South Gloucestershire in the 1970s, contains the fossilised remains of the so-called "Bristol Dinosaur" - Ken Morley from Bookmarklet