Ah, nice one - thanks for the explanation mate 😃
How does one seek a royal prerogative of mercy? Asking for a friend.
a substantial donation to the political party in power at the time (or family member of high ranking politician) usually does it mate 😉
http://news.bbc.co.uk/1/hi/england/7700137.stm
https://www.theguardian.com/uk/2008/nov/23/drug-barons-haase-bennett
https://www.telegraph.co.uk/news/uknews/3331678/Convicted-drug-dealer-bribed-former-Home-Secretary-Michael-Howard-for-early-release.html