There were sufficient 20 Pence coins in circulation already. Some 1986 20 pence coins were issued as part of Royal Mint sets, but these were Proof FDC coins not for general circulation.
The British did not produce Five Pence coins until 1968.
No. They would be worth far more than 10 pence if they were made from Silver. The British 10 Pence coins are made from 75% copper and 25% nickel. No circulating British coin has any silver content.
None. The last circulating British coins to contain any silver were dated 1946. From 1947 onwards, all circulating British "silver" coins were made from a copper-nickel alloy. The Maundy coins continue to be made from sterling silver.
In 2010, the Royal Mint produced the following British general circulation coins - Two Pound coins - 2,015,000 One Pound coins - 38,505,000 50 Pence coins - 510,090 20 Pence coins - 91,700,500 10 Pence coins - 25,320,500 5 Pence coins - 180,250,500 2 Pence coins - 38,000,000 1 Penny coins - 421,002,000 A total of 797,303,590 British coins. These figures do not include any of the Proof or bullion coins or the 2012 Olympic commemorative coins. Neither does it include the coins made for the 16 other countries the Royal Mint is contracted to produce coins for.
British coins of copper appearance, the 1 and 2 Pence coins, are made from copper plated steel. British coins of silver appearance, the cupro-nickel 5, 10 and 50 Pence coins, are made from 75% copper and 25% nickel. British 20 Pence coins, are made from 84% copper and 16% nickel.
No British coin is magnetic. Coins made from steel can be attracted to a magnet. From 1968 to 2011, the British 10 Pence coin was made from a copper-nickel alloy and therefore have no magnetic properties, copper and nickel both being non-ferrous metals. From late 2011, the British 10 Pence coin is made from nickel plated steel which has some magnetic properties similar to the 1 Penny and 2 Pence coins issued from 1992. The move towards coins made from steel is an effort by many countries to reduce the cost of manufacturing coins. Also, the coins are much more durable, even if the plating is not, and may extend the life expectancy of coins well beyond 50 years.
The non-magnetic pre-1992 'Bronze' Penny and Two Pence coins are made of copper, tin and zinc. British 1 Penny and 2 Pence coins were made from copper-plated steel from 1992 and can all be attracted to a magnet, although the coins themselves are not magnetic.
There were no copper 20 Pence coins minted, they are all made from a copper/nickel alloy giving them a silvery appearance. If your coin is copper coloured, it is either very seriously tarnished or somebody has plated it. Modified coins have no collector value.
I think pence comes from England then British Colmubia copied them and made 20 pence coins. I don't know if England has 20 pence coins.
"Old" British 5 Pence coins are those issued from 1968 to 1990 and are 23.59 mm in diameter. These include the 5 New Pence coins issued from 1968 to 1981. The larger pre-1991 5 Pence coins were withdrawn from circulation and demonetised in 1991. The new British 5 Pence coins are those issued from 1990 to present day and are 18 mm in diameter. All British 5 Pence coin from 1968 to present day are made from 75% copper and 25% nickel. They have a silvery appearance but no silver content.
No British coin is magnetic. Prior to 1992 all British coins were made from non-ferrous metals. The copper-plated steel 1 Penny and 2 Pence coins were first issued in 1992. The nickel-plated steel 5 Pence and 10 Pence coins were first issued in 2011. These are the only British coins in circulation that can be attracted to a magnet since steel is an alloy of iron, a ferrous metal.
No. British currency is only legal tender in the United Kingdom. British 2 Pence coins were made from bronze, they are now made from copper plated steel. They have never been made from gold.