Area comparison map:

twice the size of Pennsylvania; slightly smaller than Oregon

Land boundaries:
total: 490 km
[see also: Land boundaries - total country ranks ]
border countries (1): Ireland 490 km

Coastline:
12,429 km
[see also: Coastline country ranks ]

Maritime claims:
territorial sea: 12 nm
[see also: Maritime claims - territorial sea country ranks ]
continental shelf: as defined in continental shelf orders or in accordance with agreed upon boundaries
[see also: Maritime claims - continental shelf country ranks ]
exclusive fishing zone: 200 nm
[see also: Maritime claims - exclusive fishing zone country ranks ]

Climate:
temperate; moderated by prevailing southwest winds over the North Atlantic Current; more than one-half of the days are overcast
More Climate Details

Terrain:
mostly rugged hills and low mountains; level to rolling plains in east and southeast

Elevation:
mean elevation: 162 m
[see also: Elevation - mean elevation country ranks ]
lowest point: The Fens -4 m
highest point: Ben Nevis 1,345 m

Natural resources:
coal, petroleum, natural gas, iron ore, lead, zinc, gold, tin, limestone, salt, clay, chalk, gypsum, potash, silica sand, slate, arable land

Land use:
agricultural land: 71% (2011 est.)
[see also: Land use - agricultural land country ranks ]
arable land: 25.1% (2011 est.)
[see also: Land use - arable land country ranks ]
permanent crops: 0.2% (2011 est.)
[see also: Land use - permanent crops country ranks ]
permanent pasture: 45.7% (2011 est.)
[see also: Land use - permanent pasture country ranks ]
forest: 11.9% (2011 est.)
[see also: Land use - forest country ranks ]
other: 17.1% (2011 est.)
[see also: Land use country ranks ]

Irrigated land:
950 sq km (2012)
[see also: Irrigated land country ranks ]

Population distribution:
the core of the population lies in and around London, with significant clusters found in central Britain around Manchester and Liverpool, in the Scotish lowlands between Endinburgh and Glasgow, southern Wales in and around Cardiff, and far eastern Northern Ireland centered on Belfast

Natural hazards:
winter windstorms; floods

Environment - current issues:
air pollution improved but remains a concern, particularly in the London region; soil pollution from pesticides and heavy metals; decline in marine and coastal habitats brought on by pressures from housing, tourism, and industry

Environment - international agreements:
party to: Air Pollution, Air Pollution-Nitrogen Oxides, Air Pollution-Persistent Organic Pollutants, Air Pollution-Sulfur 94, Air Pollution-Volatile Organic Compounds, Antarctic-Environmental Protocol, Antarctic-Marine Living Resources, Antarctic Seals, Antarctic Treaty, Biodiversity, Climate Change, Climate Change-Kyoto Protocol, Desertification, Endangered Species, Environmental Modification, Hazardous Wastes, Law of the Sea, Marine Dumping, Marine Life Conservation, Ozone Layer Protection, Ship Pollution, Tropical Timber 83, Tropical Timber 94, Wetlands, Whaling
signed, but not ratified: none of the selected agreements

Geography - note:
lies near vital North Atlantic sea lanes; only 35 km from France and linked by tunnel under the English Channel (the Channel Tunnel or Chunnel); because of heavily indented coastline, no location is more than 125 km from tidal waters