Oh my Goodness Gracious! There are more diversity in the British honour system than in any other honour system.
This is going to be a long post again.
The Order of the Garter/Order of the Thistle honoured members of royal families, peers, statesmen, and eminent military commanders (mostly still does)
From the 18th century, the Sovereign made his or her choices on the advice of the Government. In 1946, with the agreement of the Prime Minister Clement Attlee and the Leader of the Opposition Winston Churchill, membership of the United Kingdom's highest ranking Orders of Chivalry (the Order of the Garter, the Order of the Thistle and the dormant Order of St. Patrick) became a personal gift of the Sovereign once again. Thus, the Sovereign personally selects Knights and Ladies Companion of the Garter, and need not act on or solicit the advice of His or Her Government.
The Royal Victorian Order, in the personal gift of the monarch, honoured those who had personally served the Royal Family (still does)
If the Queen had awarded these three orders to ordinary people, it would have been a political statement, and she had probably been heavily criticized by the media.
The Most Honourable Order of the Bath honoured senior military officers and civil servants (still does)
The Most Distinguished Order of St Michael and St George honoured diplomats and colonial officials (still does)
The Order of the British Empire:
The Order of the British Empire were therefore established by King George V in 1917, because he wished to create an Order to honour the many thousands of those who had served in a variety of non-combatant roles during the First World War.
Nowadays the Order of the British Empire rewards service in a wide range of areas, from contributions to the arts and sciences, work with charitable and welfare organisations and public service outside the Civil Service, with honours that include the well-known MBE and OBE. The order is awarded to people of all ages, and are (as RoyalProtocol said above) full of people of every race, colour and creed every year.
The British monarch is Sovereign of the Order, and appoints all other members of the Order (by convention, on the advice of the governments of the United Kingdom and some Commonwealth realms).
And this is also the case when it comes to Knights and Dames. Women from all walks of life mostly from 50 to 70 is awarded Dame Commander of the order.
Although the Order of the British Empire has by far the highest number of members of the British Orders of Chivalry, with over 100,000 living members worldwide, there are fewer appointments to knighthoods than in other orders.
Though men can be knighted separately from an order of chivalry, women cannot, and so the rank of Knight/Dame Commander of the Order is the lowest rank of damehood, and second-lowest of knighthood (above Knights Bachelor). Because of this, Dame Commander is awarded in circumstances in which a man would be created a Knight Bachelor. For example, by convention, female judges of the High Court of Justice are created Dames Commander after appointment, while male judges become Knights Bachelor.
Read more here:
https://www.royal.uk/queen-and-honours
https://en.wikipedia.org/wiki/Order_of_the_British_Empire
https://en.wikipedia.org/wiki/List_of_Dames_Commander_of_the_Order_of_the_British_Empire
https://en.wikipedia.org/wiki/Orders,_decorations,_and_medals_of_the_United_Kingdom
And men from all walks of life are Knight Bachelor.
Read more here:
https://en.wikipedia.org/wiki/Knight_Bachelor