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Warning signs are being used to try and stop tomb-stoning in North Cornwall.
The Maritime and Coastguard Agency's already put up six signs at favourite tomb-stoning spots around Newquay and more will be going up in the next few weeks.
Already there has been a series of limb-breaking accidents this summer.
The problem is that visitors don't realise the sea depth changes with the tides. And where jumping may be safe at one time of day with many meters of water, hours later the water will be just inches deep and the danger acute.
Our reporter Wendy Buckingham's been talking to Maritime and Coastguard Agency's Matt Pavitt. Listen to what he says: CLICK HERE