On a vast sandy bay on Ireland’s rugged Atlantic coastline, a handful of walkers and surfers brave the windy weather on Doughmore Beach.

Untouched and remote, it is an unlikely location for a controversy involving Donald Trump. But it is along this beach that the probable US Republican presidential candidate wants to build his second most controversial wall. The one on the Mexican border would be to keep out immigrants. The one on the Irish coast is to keep out the elements.