This is dangerous nonsense, stirring it up against Brown due solely to his place of birth.

I can’t speak for the Welsh or (Northern) Irish - but could you honestly imagine Thatcher, Major or Blair wearing a Scottish shirt of, by some miracle, they had made it to the final ever? Be honest.
Or IDS? Hague? Howard? had they been PM.

There’s no point pretending that is is uniquely challenged by teh quandry of multiple British identities. You should be encouraging that, not using it as a line of attack.

And is this really the site to be making remarks about the ability to sing national anthems..?

Reply: I did not say Gordon Brown should have worn an English rugby shirt. No I do not think Conservative PMs would have worn Scottish shirts if they had gone to a final to support a Scottish team. I do think he looked uncomfortable, as many have remarked.

from wikipedia -

“David Cameron was born in London, but brought up at Peasemore, near Newbury, in the English county of Berkshire,[7] the son of stockbroker Ian Donald Cameron and Mary Fleur Mount the second daughter of Sir William Malcolm Mount, 2nd Baronet.[8] His father was born at Blairmore House near Huntly, Aberdeenshire,[9] which was built by Cameron’s grandfather Ewen Donald Cameron’s maternal grandfather Alexander Geddes[10] who had made a fortune in the grain business in Chicago and had returned to Scotland in the 1880s.[11] The Cameron family were originally from the Inverness area of the Scottish Highlands.[12]”

If being a Scot is a disqualification for PM of England, why replace the current Scot with another?