Ed Miliband has apologised to Labour MPs after he posed for a picture with The Sun newspaper.
The Sun newspaper is particularly controversial in Liverpool as a result of its coverage of the Hillsborough tragedy.
The picture also provoked outcry from Labour supporters around the country.
The early stages of Miliband's leadership were characterised by a willingness to criticise Murdoch-owned media titles, including The Sun.
Miliband is understood to have defended his decision on the basis that he was showing support for the England squad ahead of the World Cup.
UPDATE: Ed Miliband's office has issued a statement: "Ed Miliband was promoting England's bid to win the World Cup and is proud to do so. But he understands the anger that is felt towards The Sun over Hillsborough by many people in Merseyside and he is sorry to those who feel offended."