Hi, The last English Monach to be beheaded was Lady Jane Grey, who was queen for nine days, then imprisoned in the Tower of London and beheaded shortly after celebrating her 16th birthday, in fact she had to step over the headless corpse of her husband in order to get to the private scaffold site within the Tower. The last British monach to be beheaded was Charles 1, although the last person to be beheaded who had a legitimate claim to the thorwn was the Duke of Momouth, James Scott, the eldest of 13 illegitimate sons to Charles 11. I hope this is helpful to you