Area: 39 - Central and Eastern England
SIBs (Significant Isles of Britain and Ireland) - The SIBs are defined as "naturally occurring land which at MHWS is completely surrounded by water with either an area of at least 30 hectares within the MHWS contour line or an 'easily accessed' summit with prominence of at least 30 metres above MSL, or both, all man-made links and structures being discounted". The definition of 'easily accessed' summits are those that can be comfortably ascended by walking, involving nothing more challenging than easy grade 1 scrambling. They were researched by Alan Holmes.
Initially confined to Britain, in August 2018 the list was extended to include Ireland, Isle of Man and the Channel Isles.
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SIBs (Significant Isles of Britain and Ireland) List & GPS Waypoints:
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Sort this list by: Name | Height | Popularity | Prominence | Significance
- '0014.-' SO824183 Alney Island (14m, p6)
- '0053.-' SU502965 Andersey Island (53m, p2)
- '0021.-' TM032142 Barrow Hill (Mersea Island) (21m, p21)
- '0016.-' TQ819838 Canvey Island (16m, p16)
- '0003.-' TM098124 Colne Bar (3m, p3)
- '0003.-' TR025935 Foulness Island (3m, p1)
- '0002.-' TQ979882 Havengore Island (2m, p2.3)
- '0002.-' TM410469 Havergate Island (2m, p2)
- '0004.-' TM241243* Hedge-end Island (4m, p4)
- '0007.-' TM233246* Horsey Island (7m, p7)
- '0004.-' TF927461 Lodge Marsh (4m, p4)
- '0004.-' TG019448 Morston Salt Marsh (4m, p2)
- '0002.-' TQ982896 New England Island (2m, p1)
- '0008.-' TL874059 Northey Island (8m, p8)
- '0007.-' TL916059* Osea Island (7m, p7)
- '0004.-' TQ958896 Potton Island (4m, p4)
- '0003.-' TF828454 Ramsey Salt Marsh (3m, p3)
- '0005.-' TM004146 Ray Island (5m, p5)
- '0004.-' TQ962889 Rushley Island (4m, p4)
- '0021.-' TF808466 Scolt Head Island (21m, p20.7)
- '0005.-' TF959446 Stiffkey Meals (5m, p3)
- '0007.-' TQ823850 Two Tree Island (7m, p7)
- '0004.-' TQ942948 Wallasea Island (4m, p1)
- '0004.-' TF949446* Warham Salt Marsh-East (4m, p2)
- '0004.-' TF948452 Warham Salt Marsh-West (4m, p4)
Total = 25 SIBs (Significant Isles of Britain and Ireland) in Area 39