The collapse of cliffs can be described in three steps.
<ul><li>Soft clay cliffs are impermeable and hold rain water. </li></ul>
<ul><li>The sea is attacking/eroding the base of the cliff, causing a wave-cut notch to form. </li></ul><ul><li>At the same time heavy rainfall causes the soft clay to become saturated, causing a slip plane to form. </li></ul>
<ul><li>The weight of the clay causes the cliff to slump or collapse. </li></ul>