The title of Knight Bachelor is the basic rank granted to a man who has been knighted by the monarch but not inducted as a member of one of the organised orders of chivalry; it is a part of the British honours system. Knights Bachelor are the most ancient sort of British knight, but Knights Bachelor rank below knights of chivalric orders. A man who is knighted is formally addressed as "Sir". There is no female counterpart to Knight Bachelor. The lowest knightly honour that can be conferred upon a woman is Dame Commander of the Most Excellent Order of the British Empire, which is one rank higher than Knight Bachelor. Also, foreigners are not created Knights Bachelor; instead they are generally made honorary KBEs.
Knights Bachelor may prefix "Sir" to their forenames and wives of Knights may prefix "Lady" to their surnames. Since recipients are not knights of an order of chivalry there are no post-nominal letters associated with the honour, however when the style "Sir" is awkward or incomplete due to a subsequent appointment, recipients may use the letters "Kt" after their name. This style is often adopted by Knights Bachelor who are also peers, baronets, or knights of the various chivalric orders. In legal and official documents "Knight" should be added after the name instead of "Kt".
Insignia
Until 1926 Knights Bachelor had no insignia which they could wear, but in that year King George V issued a warrant authorising the wearing of a badge on all appropriate occasions by Knights Bachelor; this badge is worn on the left side of the coat or outer garment. Measuring in length and in width, it is described in heraldic terms as follows:
Upon an oval medallion of vermilion, enclosed by a scroll a cross-hilted sword belted and sheathed, pommel upwards, between two spurs, rowels upwards, the whole set about with the sword belt, all gilt.
In 1974, Queen Elizabeth II issued a further warrant authorising the wearing on appropriate occasions of a neck badge, slightly smaller in size, and in miniature. In 1988 a new certificate of authentication, a knight's only personal documentation, was designed by the College of Arms.
The ImperialSociety of Knights Bachelor was founded for the maintenance and consolidation of the Dignity of Knights Bachelor in 1908, and obtained official recognition from the Sovereign in 1912. The Society keeps records of all Knights Bachelor, in their interest.