Preseli Pembrokeshire (UK Parliament constituency) most recent election in 2017, Crabb's majority was less than 1%. The constituency was created in 1997 from parts of the seats of Ceredigion and Pembroke North and Pembroke. It comprises the north and west coasts of Pembrokeshire and areas inland. It is the most westerly constituency in Wales. Much of the coastal area is in the Pembrokeshire Coast National Park. On its creation in 1997, its boundaries were co-terminous with the then District of Preseli Pembrokeshire. Since the 2006 boundary review of Welsh parliamentary constituencies, which took effect at the 2010 general election, it consists of the Pembrokeshire County
Pembrokeshire landscape was subject to considerable change as a result of ice ages; about 20,000 years ago the area was scraped clean of soil and vegetation by the ice sheet; subsequently, meltwater deepened the existing river valleys. While Pembrokeshire is not usually a seismically active area, in August 1892 there was a series of pronounced activities (maximum intensity: 7) over a six-day period. The Pembrokeshire coastline includes numerous bays and sandy beaches. The Pembrokeshire Coast National Park, the only park in the UK established primarily because of its coastline, occupies more than a third of the county. The park contains the