"A dried pea or bean was cooked in the cake. Whoever found it was the Lord (or Lady) of Misrule for night. The Lord of Misrule led the celebrations and was dressed like a King (or Queen). This tradition goes back to the Roman celebrations of Saturnalia. In later times, from about the Georgian period onwards, to make the Twelfth Night 'gentile', two tokens were put in the cake (one for a man and one for a women) and whoever found them became the the 'King' and 'Queen' of the Twelfth Night party.
"In English Cathedrals during the middle ages there was the custom of the 'Boy Bishop' where a boy from the Cathedral or monastery school was elected as a Bishop on 6th December (St Nicholas Day) and had the authority of a Bishop (except to perform Mass) until 28th December. King Henry VIII banned the practise in 1542 although it came back briefly under Mary I in 1552 but Elizabeth I finally stopped it during her reign.
"During Twelfth Night it was traditional for different types of pipes to be played, especially bagpipes. Lots of games were played including ones with eggs. These included tossing an egg between two people moving further apart during each throw - drop it and you lose and passing an egg around on spoons. Another popular game was 'snapdragon' where you picked raisins or other dried fruit out of a tray of flaming brandy!
"The first monday after Christmas feast has finished was known as ‘Plough Monday’ as this was when farming work would all begin again!
"In many parts of the UK, people also went Wassailing on Twelfth Night."
Christmas Customs and Traditions explains that "Wassailing is a very ancient custom that is rarely done today. The word 'wassail' comes from the Anglo-Saxon phrase 'waes hael', which means 'good health'. Originally, the wassail was a drink made of mulled ale, curdled cream, roasted apples, eggs, cloves, ginger, nutmeg and sugar. It was served from huge bowls, often made of silver or pewter. Jesus College, in Oxford University, has a Wassail bowl, that is covered with silver. It can hold 10 gallons of drink! Wassailing was traditionally done on New Year's Eve and Twelfth Night, but some rich people drank Wassail on all the 12 days of Christmas! The Wassail drink mixture was sometimes called 'Lamb's Wool', because of the pulp of the roasted apples looked all frothy and a bit like Lambs Wool!"
And they offer a recipe for wassail which can be found by clicking here. Christmas Customs and Traditions also states "one legend about how Wassailing was created, says that a beautiful Saxon maiden named Rowena presented Prince Vortigen with a bowl of wine while toasting him with the words 'waes hael'. Over the centuries, a great deal of ceremony developed around the custom of drinking wassail. The bowl was carried into a room with a great fanfare, a traditional carol about the drink was sung, and finally, the steaming hot beverage was served."
Supposedly, "from this it developed into a another way of saying Merry Christmas to each other! (and) one of the most popular Wassailing Carols went like this: