Fly camping, BBQs, open fires and scattered litter are "endangering" an Eryri nature reserve. National Trust issued the warning about the behaviour of a "small minority" at Cwm Idwal. They are urging people to ‘leave no trace’ after a prominent increase in illegal fly camping and littering over the summer months at various countryside and coastal locations.

They said: "In Eryri ( Snowdonia ) at Cwm Idwal, fly camping, BBQs and scattered litter is harming a highly protected habitat, the oldest National Nature Reserve in Wales famed for its rock formations and rare and fragile plant life. The heat from a recent campfire even managed to break apart a 450 million year-old glacier carved rock - a protected feature of the upland location." READ MORE: 'Deplorable' litter dumps on Yr Wyddfa as 'plastic and Prosecco' rain down from summit READ MORE: The sad pictures of overgrown and 'left to rot' Pontins holiday park in North Wales Cwm Idwal Partnership Officer Rhys Wheldon-Roberts said: “Cwm Idwal has seen a dramatic increase in biodiversity due to conservation efforts over the last 30 years.

However, this is being endangered now due to the behaviour of a small minority. “Almost nightly there is fly camping at Cwm Idwal, people lighting BBQs, campfires, leaving litter in the nature reserve. The BBQs and campfires are a concern as they burn the ground, which is a highly protected habitat, but there is also the danger of a fire spreading and threatening years of important conse.