Or at least when did it cease to act as a meaningful proxy for 'England', 'English-ness' or English football ? Rather like the Umbro logo, where once it might have meant something the drip drip water torture of bad behaviour and horrible associations made it almost as bad as the swastika.
As Billy Bragg so movingly sang in 'Take Down The Union Jack' you'd have to ask the Scots how they feel about it.

I'm not sure if Derek Riordan's musical tastes extend to Billy Bragg. He'd make a passable tribute act though.Derek's not looking for a new England. But might he be looking for another club?

No, I'm not referring to Billy Bragg's song The Marriage, but they used to tell me that all rock songs sounded the same. Of course, I never believed them. Now watch this video.

(h/t Ken Levine)

Do love this : The Billy Bragg version of The Internationale
Stand up, all victims of oppression
For the tyrants fear your might
Don't cling so hard to your possessions
For you have nothing, if you have no rights
Let racist ignorance be ended
For respect makes the empires fall
Freedom is merely privilege extended
Unless enjoyed by one and all
Chorus:
So come brothers and sisters
For the struggle carries on
The Internationale
Unites the world in song
So comrades come rally
For this is the time and place
The international ideal
Unites the human race
Let no one build walls to divide us
Walls of hatred nor walls of stone
Come greet the dawn and stand beside us
We'll live together or we'll die alone
In our world poisoned by exploitation
Those who have taken, now they must give
And end the vanity of nations
We've but one Earth on which to live
And so begins the final drama
In the streets and in the fields
We stand unbowed before their armour
We defy their guns and shields
When we fight, provoked by their aggression
Let us be inspired by like and love
For though they offer us concessions
Change will not come from above

Do love this : The Billy Bragg version of The Internationale
Stand up, all victims of oppression
For the tyrants fear your might
Don't cling so hard to your possessions
For you have nothing, if you have no rights
Let racist ignorance be ended
For respect makes the empires fall
Freedom is merely privilege extended
Unless enjoyed by one and all
Chorus:
So come brothers and sisters
For the struggle carries on
The Internationale
Unites the world in song
So comrades come rally
For this is the time and place
The international ideal
Unites the human race
Let no one build walls to divide us
Walls of hatred nor walls of stone
Come greet the dawn and stand beside us
We'll live together or we'll die alone
In our world poisoned by exploitation
Those who have taken, now they must give
And end the vanity of nations
We've but one Earth on which to live
And so begins the final drama
In the streets and in the fields
We stand unbowed before their armour
We defy their guns and shields
When we fight, provoked by their aggression
Let us be inspired by like and love
For though they offer us concessions
Change will not come from above