Ed Miliband should hold his nerve and not be "dragged along by the Ukip bandwagon" on Britain's membership of the European Union, former Labour minister and ex-European Commissioner Lord Mandelson told ITV News.
The Labour leader previously said he was against holding an in-out referendum under the terms proposed by Prime Minister David Cameron.
Lord Mandelson told Libby Wiener: "I think Ed Miliband is right to stand his ground but also to say that if there is in the future a need for, circumstances arising that require a referendum, then of course a Labour government would agree to that and put it to the British people".
More top news
The live stage version of Peter Kay's Phoenix Nights has reportedly been cancelled after actor Ted Robbins collapsed on opening night.
The much-loved local character, who had lived on the city's streets for decades, died in hospital this week after falling ill.
Man City remain five points behind Chelsea in the Premier League title race after a 1-1 draw at Stamford Bridge