Well, apparently Flash Harry was a character in the St Trinian Films of the 50's played by George Cole, and by Russel Brand in the more recent remake. This character is more akin to a Spiv and hence I don't feel a close association.
Then, digging deeper, I find Harry Flashman. This is more like it! Another fictional character, this time from Tom Brown's Schooldays, but revitalised by George MacD
onald Fraser in "Flashman". These are memoirs of of Harry Paget Flashman who became a decorated Brigadier General in the British Army, and notorious for being a lovable scoundrel and sometimes being economical with the truth. It gets worse as he was also a cheat, a thief and a coward. However he was also able to woo every available woman, liked to gamble, booze enthusiastically and through luck and cunning he is seen by others as a hero. And here he can be seen in all his glory, a lusty wench at his feet and "sword" in his hand.
This is probably why he has been an influence in Dandyism; in fact even in fashion design and furniture design. Below are a couple of great examples:-
The Flashman boot from Jeffery~West, which are a number of boots and shoes purpose built around a specifically designed last call the "Flashman". They wouldn't look out of place in the officer's Mess would they? Neither would this "poker table" in inverted commas for a reason as the design seems to be ambiguous. A little similar to that old joke or sign you see in public houses..."liquor in the front, poker in the rear". I know, extremely uncouth, but probably a lot of fun....so I'm told.
So now you know who Flash Harry is...I now take it as somewhat of a compliment.