In 1621 Edward Floyde, a lawyer, was sentenced to ride backwards through London on a horse without a saddle, have a ‘K’ (for ‘kalumnia’) branded on his forehead and be fined £5,000. Oh, and imprisoned for life. His offence was contempt of parliament. Set against that, the reprimand dished out earlier this year to international firm Withers, which had apologised unreservedly for suggesting that an MP might be sued for allegations made in parliament, looks lenient.