The Dutch, obviously (but for reasons back to the House of Orange, blah, blah).It wasn't during a tournament. It was November 2014 - Four months after the Brazil World Cup finished. Stupid mistake for a politician to make, but whether a St George's Cross draped over the house next to a white van, or a Union Flag on a white pole next to a perfectly manicured suburban lawn, or a flag from whichever country is currently being persecuted hung over the curtain pole in a city flat window, I must admit to finding the desire to hang flags at all a bit 19th century. I reckon it would be a better world if flags were only for questions on Pointless and Only Connect.
England have more often seemed to favour all white, or white and blue, not white and red. I guess this is either because of the dominant partner's assumption that the Union Flag colours belong to England, or because white and blue is easier to sell. However you could argue that the colours are generally inspired by the flag(s). To move away from arguments about nationalism and towards the much more fun trivia, let's ask the old chestnut about which teams don't play in the colours of their nation's flag and why?
If you can't be bothered to think about it, here's a link to spoilers: https://pyroonthepitch.com/2018/05/06/politics-on-the-pitch-2-the-non-flag-kit-colours-of-europe/
No blue on the Italian flag.
No white on the Germany flag.
No blue on the Japan flag
No green on the Northern Ireland flag (lots of scope for arguments on this one!)