Category:3rd millennium in the United Kingdom

• 3rd millennium in England‎ (3 C)
• 3rd millennium in Northern Ireland‎ (3 C)
• 3rd millennium in British Overseas Territories‎ (9 C)
• 3rd millennium in Scotland‎ (3 C)
• 3rd millennium in Wales‎ (3 C)

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• 3rd-millennium disestablishments in the United Kingdom‎ (7 C)
• 3rd-millennium establishments in the United Kingdom‎ (7 C)

0–9

• 21st century in the United Kingdom‎ (23 C, 14 P)

G

• 3rd millennium in Great Britain‎ (4 C)

I

• 3rd millennium in the Isle of Man‎ (2 C)