"Most people think the Mourne Wall is just the perimeter, which is about 18 miles (29km), but we actually found four miles of internal wall. Every working day the stonemasons can walk up to five ...

The work involved 600 repairs along the 22-mile (35km) length of the Mourne Wall in County Down ... are going up there [to] maybe not to walk on the wall as much because it's not really designed ...