The Significant Islands of Britain

The Significant Islands of Britain (SIBs) are islands (including plenty which can be accessed on foot at low tide) exceeding 30m prominence and/or 30 hectares, listed by Alan Holmes, with the additional proviso that they can be ascended without rock climbing. The cutoff is grade 1 scrambling, although it’s a grey area, but in theory, the SIBs are a “doable” list - although as of 2019 no-one is close to finishing. Alan Holmes also manages the SIB “ship’s manifest”, with thresholds at 80 (lower deck), 160, 240, 320, 400, 480 and 560.

Ore Stone - a scrambly English SIB. Photo credit: Richard Mclellan