When the Queen dies, the next reigning monarch will have their portrait on coins and stamps. In the case of Great Britain, that will likely be Prince Charles, once he becomes King.
Coins and Notes
Banknotes £5, £10, £20, £50 will have the Queens head, and the words "Bank Of England" Coins will have the Queens head on the obverse and the amount on the reverse.
It is not a rule that 'Queens must have their heads on coins'. It is true that Sovereigns (Kings, Queens, etc) are often depicted on coins. This has been the case since the Roman times. Queen Elizabeth II is the Sovereign of Britain, Canada, Australia, New Zealand and 14 other 'Commonwealth realms' hence Britain and some Commonwealth Realms (like Canada) choose to put her on the coins. Before she was Queen, George VI would have been on the money.
Because the Queen is New Zealand's Head of State.
It is different because she is older now.
You can see it on all British coins and paper money.
If you refer to British coins, Queen Elizabeth II is the current head of state of England and appears on the front of all British coins.
The head on New Zealand coins is that of the New Zealand Queen, Elizabeth II. Her representative in NZ is the Governor General.
While Australia remains a Constitutional Monarchy, the reigning king or queen will be on all of Australia's coins as the nominal "Head of State" (Queen of Australia). Currently, and since 1953, Queen Elizabeth II has featured on the obverse of all Australian coins.
Her Majesty is also the Queen of Canada.The Queen is the monarch of sixteen Realms of the Commonwealth, and in each realm Her Majesty's role is as a separate head of State. Canadians celebrate the Queen's birthday because Her Majesty is the Canadian head of State, and Canadian Queen.---------------------------------------------------------------------------------------------------P.S. The birthday we celebrate is that of Queen Victoria, not Queen Elizabeth.
Queen Elizabeth II is a practising Christian, she is head of the Church of England, a protestant branch of the Christian faith.
Whereas the Prime Minister is Head of the Government, the Queen is Head of State. Technically the PM gets on with running the country whilst the Queen represents the country/nation at engagements, state visits, investitures, etc. If we did get rid of the Queen we still need a Head of State, probably a President. Many presidents are no more than figureheads (like the Queen).