British Isles

The  was a place that Jamie McCrimmon, Zoe Heriot and the Second Doctor visited. It contained the United Kingdom and Ireland. (AUDIO: Prison in Space)

Geography
The British Isles were situated to the west of Scandinavia and were separated from it by the North Sea. (TV: The Lie of the Land) As it was a part of Great Britain in the British Isles, (TV: Rise of the Cybermen, Boom Town) England was not considered a part of mainland Europe, unlike Poland, France, and Norway. (AUDIO: Their Finest Hour)

History
In September 2006, Mr Cleaver predicted that a meltdown at the planned Blaidd Drwg nuclear power station would cause destruction like the British Isles had never seen before. (TV: Boom Town)

Victor Kennedy had a noted map of the British Isles in his study beneath the library at Maccateer Street. (TV: Love & Monsters)

In the 2000s, Bubble Shock! was distributed all over the British Isles. (TV: Invasion of the Bane)

In the 2010s, sent 91 flying Cybermen each into separate areas of significant population density in the British Isles, where they detonated and dispersed cyber-pollen within the rain clouds. (TV: Death in Heaven)

Behind the scenes
In the real world, the British Isles refers to the geographic archipelago, while the British Islands are the islands under the sovereignty of the United Kingdom.