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.

Who is entitled to fly the Blue Ensign?

You must be a British citizen. Your vessel must have a length of at least 7m and be: Registered in your name on the General Central Register of British Ships (for small ships), or. Registered in your name on General Central Register of British Ships.

What is a blue ensign flag used for?

The Blue Ensign (dark blue field with the Union Flag in the canton) undefaced is worn by masters of vessels in possession of a warrant issued by the Director of Naval Reserves, and by the members of certain yacht clubs.