British 1803 pattern flank officer sword?

[Richard G]

I think this is a British 'non-military' sword of the type supplied to and used by watchmen, constables, bank guards, prison officers etc. Possibly also customs officers and the merchant navy, altho' there is no evidence of a nautical connection. It seems an early example of what later became a very recognisable type associated with Parker Field.
Regards
Richard