The Port of Holyhead could become unusable if action is not taken to repair its breakwater.

The structure, reports NorthWalesLive, which is 1.7 mile long and took 28 years to build, is gradually eroding.

But if it is not repaired, the port could be be closed within the next 15 years.

Stena Ports has been carrying out day to day maintenance of the structure, but the costs of that are running at around £150,000 a year.

The mound of rubble is being worn away by waves, and experts believe it could be breached within 15 years.

Plans to repair the breakwater - the longest in Britain - are now being drawn up.

For more on the breakwater, click here.