Such a huge risk knowing the bookies scrutinise every strange bet. I’m sure it goes on regularly but for very little money. Sensible to do it low enough it’s not enough for the bookies to waste time checking.
Also as a few have said could very easily have been a red which would have scuppered the bet. I wonder what the club are thinking behind closed doors.
Doubt it would’ve scuppered the bet. Unless it was a special yellow only market, most card markets include yellows and reds. Unless there’s a trail of messages then I’d imagine it would be hard to prove.