Why German attacks could not close Britain's coastal routes

Did German mines and attacks shift British coastal traffic away from the east coast?

They disrupted and reshaped traffic, but Britain had no adequate substitute, so convoys continued under minesweeping protection.

German interference imposed losses and operational work rather than eliminating the route. Britain still needed the cargoes, ports, and distribution links served by coastal shipping. The practical response was to keep convoys moving while minesweepers and escorts reduced the danger as far as resources allowed.