Wicken Fen Nature Reserve has urged visitors to protect the site by not bringing or lighting disposable barbeques and not smoking. The National Trust site has also requested that all litter is either disposed of or taken home in light of the continuing drought. It comes after a devastating wildfire spread across Dunwich Heath on July 29, engulfing 150 hectares at its height. We are also mindful of what a fire could mean at Wicken," a Wicken Fen spokesperson said. Wicken Fen is one of Britain's oldest nature reserves and one of Europe's most important wetlands, home more than 9,000 recorded species.