At Potton Point on Devil's Reach, the Middleway creek, which separates the islands of Potton and Foulness, joins from the south and defines the western edge of Foulness Island. The Middleway creek splits to pass either side of Rushley Island, and becomes Havengore Creek once the two channels rejoin.
The location at Potton Point on Devil's Reach is marked by the confluence of the Middleway creek, which separates the islands of Potton and Foulness, and defines the western edge of Foulness. The creek then splits to encircle Rushley Island before rejoining as Havengore Creek.