Pilot services once took about 13,000 boats a year through Potter Heigham's medieval bridge on the River Thurne.

But this year, just one vessel was guided through.

A boat struggles to navigate under Potter Heigham bridge(Image: Newsquest)

The landmark, built in the 14th century, is a notorious navigational hazard and has about 6ft of headroom to pass through, although this varies depending on water levels.

The crossing is a frequent focus of videos showing failed attempts to pass through and all hire boats are required to use a pilot if they wish to go under.

Private boat owners can also use the service of a pilot.

In recent years, high water levels have made it nearly impossible to fit under, except for smaller craft.

It means that fewer boats are now visiting the Upper Thurne area, which includes Hickling Broad, Heigham Sound, Horsey Mere and Martham Broad.

The matter came up........

© Eastern Daily Press