Some of our most beautiful rivers are ‘chalk streams’. Their pure, clear, constant water from underground chalk aquifers and springs, flowing across flinty gravel beds, make them perfect sources of ...

Environment Agency About 350 crayfish are being moved from the River Witham in Grantham ... crayfish successfully transferred to chalk streams in the Lincolnshire Wolds. Surveys carried out ...

Last July, 600 white-clawed crayfish were moved from the River Witham to more remote chalk streams in the Lincolnshire Wolds. The Environment Agency (EA) said the crustaceans had started to breed ...

Some of our most beautiful rivers are ‘chalk streams’. Their pure, clear, constant water from underground chalk aquifers and springs, flowing across flinty gravel beds, make them perfect sources of ...