Analysis of information sources in references of the Wikipedia article "List of Nuttall mountains" in English language version.
Pillar Rock, qualifying as a separate summit to Pillar (Lake District) itself in the Nuttalls and other lists [the Birketts], is the bane of summit baggers everywhere. Wainwright says that, to walkers "Pillar Rock is positively out of bounds. Don't even try to get a foothold on it". It's graded as a "moderate" rock climb.
The definition of a Nuttall is "any summit of 2000ft (610m) or more which rises above its surroundings on all sides by at least 50ft (15m)". [...] There are currently 446 Nuttalls: 257 in England and 189 in Wales.
Nuttalls: Hills in England and Wales at least 2000 feet high with a drop of at least 15 metres on all sides, as published in The Mountains of England and Wales. The list includes 128 summits that do not qualify as Hewitts. Particularly notable is Pillar Rock as its ascent by the easiest route is a Moderate rock climb or Grade 3 scramble. [...] Outside Scotland, the Hewitts (Hills in England, Wales and Ireland over Two Thousand feet high), together with the Nuttalls in England and Wales, are the most accurate and up–to–date of a succession of publications listing the 2,000–foot summits.
In June 2010 Dawson created the Simms (Six–hundred Metre Mountains; originally called Sims) by combining the Murdos, Corbett Tops, Graham Tops and Hewitts and lowering the height threshold to 600m. [...] Hewitts are Hills in England, Wales and Ireland at least 2000 feet high with a drop of at least 30 metres on all sides. Although subsumed into the Simms, the list has been retained by its author.
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But on September 16, Forrest's successful ascent of Scafell Pike completed the challenge and secured him the record. He did it in precisely six months, enough to make him faster than any of the 292 people who did it before him. The challenge is known in the hiking world as "the Nuttalls".
Numbering several hundred summits, the Nuttalls - the 2000-foot peaks of England and Wales - are a classic tick list. In this age of accurate mapping you might assume the list was definitive, but in fact many entries have been added or demoted over the years. The most recent changes have been made only this month. Myrddyn Phillips, one of the surveyors responsible for several revisions, takes us through the additions and deletions.