In use since at least 1991
Blazon: Per pale gules two keys in saltire argent, joined in base by a chain sable and or a castle triple-towered, the sinister side in ruins gules
[W]ith the Romans, in those blisfull days, of senate government, the same order of knighthood (as we call it) was differenced from the estate of Gentlemen by wearing of
a chain of gold, as an insignia of their degree.
– From The Blazon of Gentrie by Sir John Ferne (1586), p102
In use since at least 1486, granted 1970
Blazon: Or the figure of St. Leonhard proper robed with a chain draped over his dexter arm sable, bearing in that hand a croizer argent and in his sinister hand a book azure, surmounted in base by an escutcheon of the field a lion rampant of the second, armed and langued gules, debruised by a bendlet of the third