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)

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)

In 2008, 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.