A
blue field with the
Union occupying one quarter of the field and placed in the
canton.
The Blue Ensign is a
flag, one of several
British ensigns, used by certain organisations or territories associated or formerly associated with the
United Kingdom. It is used either plain or
defaced with a
badge or other
emblem.
The evolution of the Blue Ensign followed that of the
Union Jack. The ensign originated in the 17th century with the
St George's Cross (the
Flag of England) in the
canton, and with a blue field.
English Blue Ensign as it appeared in the seventeenth century
Plain Blue Ensign
Prior to the reorganisation of the
Royal Navy in 1864, the plain blue ensign had been the ensign of one of three squadrons of the Royal Navy, the
Blue Squadron. This changed in 1864, when an order in council provided that the
Red Ensign was allocated to merchantmen, the Blue Ensign was to be the flag of ships in public service or commanded by an officer in the
Royal Naval Reserve, and the
White Ensign was allocated to the Navy.
Thus, since 1864, the plain blue ensign (without any defacement or modification) is permitted to be worn, instead of the Red Ensign, by three categories of civilian vessel:[1]
British merchant vessels whose officers and crew include a certain number of retired
Royal Navy personnel or Royal Naval Reservists, or are commanded by an officer of the
Royal Naval Reserve in possession of a Government warrant. The number and rank of such crew members required has varied over the years, as have the additional conditions required, since the system was first introduced in 1864.
Royal Research Ships by warrant[a] whether crewed by former Royal Navy personnel or Merchant Navy personnel.
Permission for yachts to wear the blue ensign (and other special yachting ensigns) was suspended during both
World War I and
World War II.
Defaced Blue Ensign
Since 1864, the Blue Ensign is
defaced with a badge or emblem, to form the ensign of United Kingdom government departments or public bodies. Current defaced Blue Ensigns (besides yacht clubs listed below) are:
Royal Air Force marine vessels (such as seaplane tenders) flew a defaced blue ensign with an eagle and anchor.[3]
Yachting Blue Ensigns defaced by the badge of the club were recorded in the Navy List until 1985, and now they are administered by the Royal Yachting Association for the Ministry of Defence. Current defaced Blue Ensigns are:[4]
Blue Ensign worn as a jack by the Royal Canadian Navy 1921–1957 (with green maple leaves in the shield)
Blue Ensign worn as a
jack by the
Royal Canadian Navy 1957–1965 (with red maple leaves in the shield)
The
ensign (1879–1928) and the
jack (1928–1947) of the
Royal Indian Navy (HM Indian Marine: 1879–1892, Royal Indian Marine: 1892–1934, Royal Indian Navy: 1934–1950):
Blue Ensign worn as an ensign (1879–1928) and a jack (1928–1947) of the
Royal Indian Navy[6]
The badge in the flag consists of
Mercury, the god of Commerce and Merchandise, presenting to
Britannia, a fisherman who, in a kneeling attitude, is offering the harvest of all the sea. Above the device in a scroll are the words Terra Nova, and below the motto Hæc Tibi Dona Fero or "These gifts I bring thee." The seal was redesigned by Adelaine Lane, niece of Governor Sir
Cavendish Boyle in 1903.