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The British isles are separated from the European continent by the NORTH SEA and the ENGLISH CHANNEL.
The English Channel in its widest part is 220 km wide and in the narrowest, what is called the STRAIT OF DOVER is only 32 km. In the west the British Isles are washed by the ATLANTIC OCEAN, in the east - by the NORTH SEA.
The two largest islands of the British Archipelago, Great Britain and Ireland, are separated from each other by the IRISH SEA and the two straits, the North Channel - 20 km wide, and St.George's Channel - over 100 km wide.
The British Isles are known for their greatly indented COASTLINE.
Very much indented is the WESTERN coast,... The EAST coast is less lofty and more regular than the west coast, land sloping gradually down to the low sea shore and the coastal lowlands being flooded frequently.
Steep is the ENGLISH coast of the Strait of Dover, where the chalk ridge comes right up to the sea repeating the chalk break of the French coast on the other side of the English Channel.
Most of the British PORTS are situated in the mouths, wide estuaries of rivers.

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