Sorry if it was already done, but I couldn't find a discussion about it.
When the news of Cornwallis' surrender in Yorktown reached London George III drafted an abdication notice (that of course was never delivered). His intention was to leave the British throne to the Prince of Wales and go to Hanover. So, WI he had delivered the notice? Would Parliament had accepted it? And if they had, how an earlier reign of George IV would look like?