A new study has found the growing population of deer in the Norfolk Broads is harming wildlife.

The report commissioned by the Broads Authority (BA) has warned mammals living in the protected wetlands are causing “high levels of damage” by grazing wetland plants and eating farmers’ crops.

Experts used thermal imaging to track the movements of the deer, which are estimated to number nearly 4,500 in the Broads according to the latest survey.