There are several reasons why the coast at Holderness is eroding so quickly: Bridlington is protected by a 4.7 km long sea wall. Hornsea is protected by a sea wall, groynes and rock armour.

It is fed by the movement of material from the erosion of the Holderness Coast to the north. This is an area of weak boulder clay. Salt marshes may be formed behind a spit. The zone behind a spit ...