Nobleman #4

As a nobleman, I constantly have to deal with money, either coming as profit, leaving as expenses,

buying and selling goods, and more. It has come to my attention that the British monetary system is not as organized and orderly as other currency systems today and so I shall share with you on how its complications work. Today, Queen Victoria is found on most of British currency.
After the Normans invaded England in 1066 and to this day, the basic monetary systems have been the same, although different types of coins have been added to the system. There are three main units of money, the pound, the shilling, and the penny. Each are represented by their own symbols:
Pounds=£ or |; Shillings=s. or /- (from the Latin solidus); Pence=d. (from the Latin denarius, an ancient Roman silver coin). The symbols and numbers are spaced using hyphens. (£1-3s.-5d.)
There are 20 shillings in a pound and 12 pennies in a shilling, meaning that there are 240 pence (the plural of penny) in a pound. Each penny is divided further into two halfpence, and each halfpence is divided into two farthings, so there is 4 farthings in one penny.
Why are there 20s. in £1 and 12d. in 20s.? This is because there used to be a unit of weight for precious metals called a pennyweight during the rein of King Henry II. One penny weighed one pennyweight, and 240 pennyweights equalled one pound.

Here are the coins of the currency system (some are still used but some are defunct):
Farthing (2 farthings in 1 halfpenny)                         Halfpenny (2 halfpennies in 1 penny)
Penny (3 pence in 1 threepenny bit)                          Half-Groat (2 half-groats in 1 groat)
Threepenny Bit/(2 threepence in 1 sixpence)            Groat (4 pence in 1 groat)
Sixpence (2 sixpence in 1 shilling)                            Shilling (2 shillings in 1 florin)                                    Florin (1 florin and 1 sixpence in 1 half crown)        Half Crown (2 half crowns in 1 crown)
Crown (2 crowns in 1 half-soverign)                         Half-Sovereign (2 half-soverigns in 1 sovereign)
Half-Guinea (1 half-soverign and 1 sixpence in one half-guinea)
Sovereign (1 pound coin)                                          Guinea (1 pound and 1 shilling in 1 guinea)
£5 coin
A threepenny bit (or threepenny) is also known as a joey, a sixpence is also known as a tanner, a penny is also known as a copper, a shilling is also known as a bob, and a florin is also known as a two bob bit. 1 crown is equal to 5 shillings and is sometimes called a dollar as well.

The guinea (My favorite denomination) has a value of £1-1s. and is used only when giving or receiving currency with the nobility and gentlemen. There used to be a guinea coin, but in 1816, the coin was taken out of circulation. The Guinea coast in Africa is famous for its gold, which is why the coin was named a guinea.
There are also special ways of writing certain denominations. For instance, 12s.-6d. would be written as 12/6 and 10 shillings would be written as 10/.
There are also paper banknotes for higher denomination values. These include the quid, or the £1 banknote, the fiver, or £5 note, the tenner, or £10 note, the £20 banknote, etc.
There have been many more different coins and banknotes throughout British history, and this is no means a complete list.
Maybe one day the currency system will be decimalised...

Sources:
http://resources.woodlands-junior.kent.sch.uk/customs/questions/moneyold.htm#back
http://www.studyenglishtoday.net/british-money.html
http://media.liveauctiongroup.net/i/13425/14157083_1.jpg?v=8CF7F23209D6C60 (Picture)