Area: 42 - South East 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
- '0005.-' TQ865724 Burntwick Island (5m, p5.3)
- '0012.-' TQ784702 Hoo Island (12m, p12)
- '0041.-' SU641045 Horsea Island (41m, p36)
- '0039.-' SU786749 Loddon Island (39m, p3)
- '0008.-' SU647019* Portsea Island (8m, p8)
- '0013.-' SZ688997 Sinah Common (Hayling Island) (13m, p13)
- '0242.P' SZ568785 St Boniface Down (242m, p242)
- '0003.-' TQ771704* St Mary’s Island (3m, p3)
- '0076.-' TQ970722 The Mount (76m, p75.7)
- '0006.-' SU765019* Thorney Island (6m, p6)
- '0035.-' SU782798 Wargrave Island (35m, p3)
- '0011.-' SU636025 Whale Island (11m, p11)
- '0022.-' SU940774 Windsor Racecourse Island (22m, p2)
Total = 13 SIBs (Significant Isles of Britain and Ireland) in Area 42