UK flags
Flags and flag flying in the United Kingdom
From the Union Flag and its complex history to the latest community flag, we maintain a special focus on the flags of the UK. Everything here is free to read.
UK Flag Registry
The only definitive record of the national, supranational, local and community flags flown in the UK, each with its design, specification and history.
Search the Registry Free to readFlag protocol
Flying Flags in the United Kingdom, our authoritative, fully illustrated guide to the rules of flag flying, online or as a free PDF.
Read the guide Updated for 2026Flag flying days
Every official and customary flag flying day in the UK this year, including the designated days for government buildings.
View the calendar Free to readUnion Flag specification
The exact proportions, colours and construction of the Union Flag, for anyone making or checking one.
View the specification Free to readUnion Flag history
Four hundred years of the Union Flag, from the Stuart Crown through two Acts of Union to the flag flown today.
Read the history Free to readUnion Jack or Union Flag?
The question we are asked most, answered with four centuries of evidence.
Settle the argument