The Coats of Arms

The official coat of arms
These arms are used by the Queen in her official capacity as monarch, and are officially known as her Arms of Dominion.
The shield shows the Royal emblems of 3 parts of the UK:
The 3 lions of England (first and fourth quarters)
The lion of Scotland (the second quarter)
The harp of Ireland (the third quarter)
The garter with the motto:
‘Honi soit qui mal y pense’ (a symbol of the Order of the Garter)
‘Dieu et mon droit’
the English lion, the Scottish unicorn, the Royal crown
Plants: rose, thistle, shamrock

The Royal Coat of Arms in Scotland
The shield is surrounded by the collar and pedant badge of the ancient Order of the Thistle.
Mottos:
‘In defens’
‘Nemo me impune lacessit’
The unicorn supports the ‘Andrew’ as a banner, the lion – the ‘George’.

The Coat of arms of England
When King Richard I ("The Lionheart") came to the throne he first adopted his personal arms of two lions rampant on a red field, however by the end of his life he had adopted a shield with three lions passant, on a red field. The origin of the third lion is unclear.

The Coat of Arms of Scotland
The Royal Coat of Arms of Scotland was the official coat of arms of the monarchs of Scotland, and was used as the official coat of arms of the Kingdom of Scotland until the Acts of Union of 1707.
A form of these arms was first used by King William I in the 12th century.

The Coat of Arms of Wales
Before the English conquest, Wales was ruled by a number of Kings and Princes, whose dominions shifted and sometimes merged following the vagaries of war, marriage and inheritance. All these Kings and Princes were ascribed personal coats of arms, often retrospectively if they lived before the dawn of heraldry, and these were borne by their descendants in Wales.

The Coat of Arms of Ireland
A gold harp with silver strings on a St. Patrick's blue background. The harp, and specifically the Cláirseach (or Gaelic harp), has long been Ireland's heraldic emblem. It appears on the coat of arms which were officially registered as the arms of the state of Ireland on 9 November 1945.