amended or updated unless the entire DoBIH data is re-downloaded again. (‡) Would not have been eligible for Dawson's 2004 "imperial" list of 111 mountains with prominence over . (‡‡) Added since the 2006 "metric" list of 119 mountains with prominence over , based on updated surveys. Sub–Majors by height In 2006, mountain database publisher, Mark Trengove, added a list of seven "Sub–Majors" (to Dawson, Woodall, and de Ferranti's P600 "Majors"), which had a prominence of between , and which possibly could become P600s, or Majors, in the future due to any possible discovered "contour uncertainty, rounding error, or map error". Since 2006, one of Trengrove's Sub–Majors, Moel Siabod, was re–surveyed and shown to be a P600 "Major". The list below is the October 2018 DoBIH list of the six mountains with a prominence between in the British Isles. DoBIH codes The DoBIH uses the following codes for the various classifications of mountains and hills in the British Isles, which many of the above peaks also fall into: Prefixes s sub x deleted Suffixes = twin See also List of mountains of the British Isles by height Lists of mountains and hills in the British Isles List of mountains in Ireland List of Munro mountains in Scotland List of Murdos (mountains) List of Furth mountains in the British Isles List of Marilyns in the British Isles Notes References General sources External links The Database of British and Irish Hills (DoBIH), the largest database of mountains and hills in the British Isles Hill Bagging UK & Ireland, the searchable interface for the DoBIH Alan Dawson, Rob Woodall & Jonathan de Ferranti P600 (the "Majors") Table, pre the revision of Moel Siabod to P600 status The P600s: The 119 Major Mountains of Britain and Ireland, pre the revision of Moel Siabod to P600 status The 119 The P600m Peaks in the British Isles, pre the revision of Moel Siabod to P600 status P600