From Wikipedia
“Sunderland is unique in the United Kingdom as being the only community to be on the mainland and yet dependent upon tidal access. The only vehicular access to the village is via a single-track road from Overton 1.5 miles (2.4 km) away crossing a tidal marsh. The road is covered by water at every high tide. Among other effects, this results in the children of Sunderland sometimes being required to arrive late at school in Overton or to leave early to avoid being cut off by the tide.”
See here for source and more.
A BBC television programme about this village is here (but may not remain accessible)
Villages By The Sea: Sunderland Point.
A view of the tidal road is here
Here is a picture from Friends of Sunderland Point website
From their website
The Point is an attraction to those who wish to spend time rambling, bird watching, cycling, sketching, painting, photographing, observing wild flowers or simply admiring the hauntingly beautiful landscape of the estuary and salt marshes backed by the moors of North Lancashire to the East and the South Lakeland Fells to the North.”
DO NOT RISK IT!”

