The UK's vexillogical organisation. Includes details of the Union Jack, the flag library in Hull, publications and about vexillology.
Know How: The Union Jack
Highlighting the history and meaning of the union Jack that is made up of three different national symbols. Information available in English and Italian.
The Union Jack
Highlighting the history of the Union Jack and how it became named with an explanation of its use as a ensign.
Offers information on Wiltshire's flag, which did not exist until 2007.
World Flag Database
A London based institute offering a full index containing more than 260 pages of flags of countries and international organisations.