Where are the largest sand dunes in UK?

The largest sand dunes in the UK are located at the Holkham National Nature Reserve in Norfolk. This area features extensive dune systems, with the most prominent being the Holkham Dunes, which stretch along the coastline. Additionally, the Sand Dunes at Formby Point in Merseyside are also notable for their size and ecological significance. These locations provide important habitats for various plant and animal species.