historicengland.org.uk · Heritage Register
Scheduled Monument entry for the Inner Mulberry / Intermediate Pierhead Pontoon.
Inner Mulberry
Tidal harbour remnant with anemones and slack-water timing.
FreedivingScuba DivingSnorkelingBoatIntermediate0m - 15m
Artificial reef
Local operator required
Use a local boat operator to hit the workable tide window.
Shallow boat dive off Selsey; plan around tide and visibility, with strong local interest for invertebrates and small critters.
About Inner Mulberry
Inner Mulberry is a shallow, tide-sensitive Mulberry Harbour remnant off Selsey, marked by a tall red can buoy and best dived around slack or high water. The structure is more about the life clinging to the concrete and steel than big scenery, with dense anemones, nudibranchs, scorpionfish, crabs, and lobsters giving it interest. It suits divers who are happy to work around the tide and accept short-visibility UK conditions.
Safety & Access
Site Conditions
Low visibilityRestricted accessStrong current
Safety Notes
Slack-water timing matters more than depth. Low water exposes the structure, and strong tide or poor visibility can make the site much less forgiving.
Access Restrictions
Plan the dive around slack or high water; the structure dries at low water and the access window is tide-dependent.
Legal Notes
Treat it as a protected heritage feature and follow local access guidance.
Where Is Inner Mulberry?
Featured Operators
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Local Intel For Inner Mulberry
Community notes to help plan your visit.
Scuba Diving
Shallow structure diving with wreck-like surfaces, swim-through feel, and plenty of small invertebrate life.
Freediving
Workable for shallow breath-hold sessions around slack tide, but the tide window and low visibility are the real constraints.
Snorkeling
Possible from a boat in calm, well-timed conditions, especially when the structure is just covered.
Wildlife at Inner Mulberry
Species commonly reported at this site, with direct links into their wildlife guides.
Research Estimate At Inner Mulberry
Conservative baseline from public research. No community dives logged yet.
Avg. Visibility4m
Access3/5 · Moderate entry effort
Coral1/5 · Heavily damaged
Aquatic Life4/5 · Great variety
Facilities4/5 · Good facilities
CurrentStrong current
