Lists of mountains and hills in the British Isles in England, 366 in Wales and 11 in the Channel Islands. A Simm is a mountain the British Isles that is over high and has a prominence of at least . The word comes from Six-hundred Metre Mountain. There are currently 2,754 recorded Simms in the British Isles, including 2,188 Scottish Simms, 192 English Simms, 149 Welsh Simms, 1 Isle of Man Simm, and 224 Irish Simms. By definition, all Simms are also TuMPs (see below) and most, if not all, are mountains, depending on whether 600 metres or 2,000 feet (610 m) (e.g. a ), is used as the
History of the British Isles known as the Old and Middle Stone Ages, were characterised by a hunter-gatherer economy and a reliance on stone tool technologies. The Lower Palaeolithic period in the British Isles saw the region's first known habitation by early hominids, specifically the extinct Homo heidelbergensis. One of the most prominent archaeological sites dating to this period is that of Boxgrove Quarry in West Sussex, southern England. By the Mesolithic, "Homo sapiens", or modern humans, were the only hominid species to still survive in the British Isles. British Isles were linked to continental Europe by a territory named Doggerland. In the British Isles,