Diane Bath, 62, who runs The Post Office in Broughton-in-Furness, Cumbria, spotted a new £1 King Charles coin that is entirely in one colour – and now she plans on selling itDiane Bath, 62, who runs The Post Office in Broughton-in-Furness, Cumbria, spotted a new £1 King Charles coin that is entirely in one colour – and now she plans on selling it