Preserving a wobbly bog, described as “a real gem in Wales’ natural crown” is being made slightly more tricky by the presence of unexploded World War Two bombs.

Crymlyn bog on the outskirts of Swansea is the largest of Wales’ last remaining quaking bogs - earning its name as the peatland habitat literally shakes under your feet.

But these bogs are under threat due to damage caused by drainage, pollution and neglect and are part of a £5m restoration project.