A amateur fossil hunter is celebrating a once-in-a-lifetime discovery after finding a huge mammoth tooth on a beach.

Chris Bien, 56, was visiting Holland-on-Sea, Essex, as part of her birthday celebrations when she took a walk on the beach with her husband Mark,

Mrs Bien, from Goring-by-Sea, West Sussex, stopped to sit on a rock by the water's edge when she looked down and saw a wavy line pattern in the gravel.