Exploration work at a former tin mine in Cornwall may stop because of rising costs concerns, investors say.

BBC: South Crofty tin mine exploration 'could stop'

Elsewhere, an extra pump has been brought in to help stop water from the old Wheal Jane tin mine overflowing.

BBC: Looe main access roads hit by landslips

Dr Carter and his graduate students have been experimenting with a dummy mine in a cake tin full of sand.

ECONOMIST: Landmines: Clearing the killing fields | The

Deposits of fine tin too small to mine were allowed to drain into rivers and into the sea.

BBC: Row over Cornwall seabed tin sifting plan

South Crofty mine originally closed in 1998 after the price of tin hit an all-time low.

BBC: Mining at South Coffee

The booming economies of China and India have increased worldwide demand, and Wolf Minerals hopes when the mine is reopened it could employ more than 200 people and produce about 3, 000 tonnes of tungsten and tin a year.

BBC: Hemerdon mine company secures further ?50m