This is a list of mountains in Britain and Ireland by height and by prominence. Height and prominence are the most important metrics for the classifications of mountains by the UIAA; with isolation a distant third criterion. The list is sourced from the Database of British and Irish Hills for peaks that meet theconsensus height threshold for a mountain, namely ; the list also rules out peaks with a prominence below, and thus, the list is therefore precisely a list of the 2,754 Simms in the British Isles. Many classifications of mountains in the British Isles consider a prominence between as being a "top", and not a mountain; however, using the prominence threshold gives the broadest possible list of mountains. For a ranking of mountains with a higher prominence threshold use:
As of 2 July 2020, 6,768 people had climbed all 282 Scottish Munros, as of April 2020 11 people had climbed all 1,557 Marilyns of Great Britain, while as of May 2020 only 3 people have completed the 2,531 Simms of Great Britain, Ken Whyte, Iain Thow and Michael Earnshaw, all of whom have also completed the Irish and IOM Simms too, so including all 2,755 Simms of the British Isles. On 5 December 2018, the BBC announced that Foel Penolau had been re-surveyed and promoted to Hewitt status. Also, Cyrniau Nod has been replaced as a Marilyn by Foel Cedig.
Coverage of Simms
Despite using the lower threshold for prominence of, the UIAA threshold for an "independent" peak, one Scottish Munro is missing, namely Maoile Lunndaidh whose official prominence changed to in 2014;, the list of 2,754 British Isles Simms contained:
Simms by height by prominence
This list was downloaded from the DoBIH in October 2018, and includes all British and Irish peaks with a prominence below. Note that topographical prominence is complex to measure and requires a survey of the entire contours of a peak, rather than a single point of height. These tables are therefore subject to being revised over time, and should not be amended or updated unless the entire DoBIH data is re-downloaded again. The default table ranking is by height, so where the table is sorted by for example Region, the table will list the mountains within each Region by order of height.
