England coach Roy Hodgson asked his players to sing the national anthem before games ahead of the Euros kicking off.
The Daily Mail says the issue had been raised by the managing director of Club England, Adrian Bevington.
But it was Hodgson who called his players together last month, ahead of the pre-Euro 2012 friendlies against Norway and Belgium, and told them what he expected of them as English internationals at a major tournament.
He made the point that the country was celebrating the Queen's Diamond Jubilee but he also wanted to see that display of unity on the pitch before matches in Eastern Europe. As millions of television viewers at home have seen, all the players have adhered to Hodgson's wishes.