What song did England play when it played the national anthem in the football match?

God bless the queen.

2. What is the origin and related story of this song?

God Save the King is a patriotic song. I'm not sure who the author is. Traditionally, it is used as the national anthem of Britain, Canada and other members of the Commonwealth, and it is also an ode of the British royal family. When the British monarch was male, this song was called "God Save the King"; When the gender is female, sing "God Save the Queen". There is no official version of this song. In fact, no imperial edict or law declares it as the official national anthem. It is generally believed that the current tune of this song was composed by Dr. Henry Kerry, although some paragraphs that appeared in some earlier versions also appeared in the current version, which led to some confusion. It is believed that the first performance of this song took place at a banquet in 1740, when Carey sang this song to congratulate Admiral edward vernon on seizing the port of Pietro from the Spanish. Traditionally, the first public performance is considered to have taken place in 1745. This song was used to support the king after he was defeated in the battle between King George II of England and Bonnie Prince Charlie, a member of the James II Party who claimed the British throne (who was widely supported by Scots, so he had the last paragraph of this song against Scotland).

3. Is this song the national anthem of Britain or the exclusive song of England?

This song has been used as the national anthem in most Commonwealth countries, including Australia, Canada, New Zealand, Jamaica and Bahamas. Now, the status of China songs in some countries has been like "Forward Australia" and "Oh! Canada, Bahamas, move on! Jamaica, the land we love, God bless New Zealand, etc. And "God Save the Queen" generally does not apply as the national anthem, but continues to be used as a royal carol. This song was once the national anthem of Ireland. In the 1920s, it was replaced by Song of the Warrior.

If this song is the national anthem of Britain, do Wales, Scotland and Northern Ireland also use the same song in football matches?

England, Northern Ireland and some overseas territories use God to bless our king, Scotland uses the flowers of Scotland, and Wales uses the land of my predecessors.