The dramatic moment a huge chunk of 150ft tall cliffs comes crashing down on a beach is caught on video.

The footage shows more than 1,000 tonnes of ancient rock suddenly collapsing in two stages at West Bay in Dorset.

The rockfall happens seconds after a 'little puff of dust' is seen coming from the middle of the sandstone cliff just as it is about to crumble.

Moments later a 150ft tall stack falls away and slumps on to the beach.

The fall immediately weakens the neighbour rock buttress which then goes the same way.

The footage was shot at 10.53am on January 18.

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