The X Factor finalists’ charity single Hero has gone straight to the top of the UK charts after outselling the rest of the top 10 put together.

Early sales figures suggested that the song – a cover version of the 1993 Mariah Carey hit Hero – sold over 313,000 copies in its first week of release.

And music industry experts have tipped it to become the biggest charity single of the decade, with the potential to sell over a million copies.

“The public’s response to this single is amazing,” said HMV spokesman Gennaro Castaldo.”It has the potential to be the biggest release of the decade with an extended run at the top of charts.”

All net record company profits from sales of the single will go to the Help For Heroes charity – which helps servicemen and women injured in the line of duty – and the Royal British Legion Poppy Appeal.

High street retailer Woolworths has also pledged to donate its profits from sales of the single to charities, while Chancellor Alastair Darling has said that VAT on sales will be waived and also donated.

The track received its debut on last Saturday night’s show, with the finalists performing it live.