There have been rumours about these sorts of things for years the last time it was a 2008 shield 20p with a letter 1 on it - that was never proved .
Can anyone not realise that the royal mint now and the royal mint in 1861 are totally different , no a, b, and c mintmarks etc .
Mistakes and mintmarks hardly ever exist in the 21st century (ok there have been a couple)
You would think this country was going backwards tecnologically if you listened to some people