
Newhaven Coastguard is warning people to stay away from the cliff top at Seaford that is 'actively moving'.
Over the weekend a large crack appeared on the cliff - which is on the coastal path near Seaford Head and Hope Gap.
However, the coastguard says because of the recent weather it is moving and could collapse without warning.
The crack has reportedly got larger today (Tuesday) and 'dropped significantly.
People are therefore being advised to stay away from the area.
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There's been another sizeable cliff fall a few miles down the coast at the Seven Sisters.