I did put across a more serious P.O.V. in the Scottish Chess Mag but the blog thing allows me to more scope.
It Begins...

I’m not too sure...in fact I have no idea at all of what the London Chess
Club badge looked like, if indeed it had one, so I have made that one up.
I’ve also guessed at the year of foundation, it could have been in the 1790’s.
Of course their badge could have looked something like this.

But not like this because Queen Victoria was not Queen in 1820.

(and Big Ben was not built till 1843 but I had run out of badge ideas.)
It then goes on to explain why Edinburgh had Black in four of the five games and
why London did not move first in four of the five games even though they were white.
(confused? It's what happened. Try explaining that one using only one diagram.)
https://www.redhotpawn.com/chess-blog/t ... -scots.527
The gist of it all is;
London thinking they were winning game 5 suggested this be the last game.
Edinburgh knowing there were good winning chances for them agreed.
The plot was Edinburgh keeping game 3 going long after London were due to start another game.
London fed up with game 3 asked Edinburgh to go first in another game. (game 5) and when this
critical position arose...
Edinburgh is white and to play
...Edinburgh, hoping London would misread the position planted the seed of making this the last game in
London's minds. Around about here London, thinking they were winning suggested this is the last game.
Here is game 5. Edinburgh (white here) moved first but were Black...(see the link)