List of Marilyns in the British Isles
A Marilyn is a hill or mountain in the United Kingdom, Ireland or surrounding islands with a prominence of at least 150 metres (492 ft), regardless of its absolute height or other characteristics such as topographic isolation. Marilyns may include true mountains (with heights above 600 m (2,000 ft)) as well as smaller hills, as long as they meet the prominence criterion.
Source: Wikipedia — List of Marilyns in the British Isles (CC BY-SA 4.0)