The case against fashion duo Domenico Dolce and Stefano Gabbana - who have been found guilty of tax evasion - dates back to an investigation that began in 2008.
A judge ruled that the pair sold their brand to Luxembourg-based holding company Gado in 2004 to avoid declaring taxes on royalties of about 1 billion euros.
The designers are one of the few high-profile cases to have come to trial so far since Italian authorities launched a tax avoidance crackdown.
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The Foreign Secretary was unable to rule out the possibility of continuing to pay money into the EU when he spoke to Peston On Sunday.
He told Peston on Sunday: "The country is crying out for leadership from the Prime Minister. We want to know her vision."
All the profits from the sale of each download of the forthcoming single would go to Shooting Star Chase and Together for Short Lives.