Speaking to ITV News, David Blunkett has told those criticising Ed Miliband to "get off your bum, and get out there and campaign."
The veteran MP - who has announced he is standing down - said: "My message to people who are chipping away at Ed Miliband: forget the idea that someone else is going to step forward or there's going to be some kind of peremptory election. There isn't.
"So get off your bum and get out there and campaign. Not for any individual but for the values we espouse."
Mr Blunkett added that if Labour were to lose next year's election they could be out of power for a very long time.
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The RSPCA has outlined in detail its policy on the shooting of seals that attack salmon stocks "as an absolute last resort".
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The RSPCA is being criticised over its new welfare standards which permit salmon farmers to kill seals that attack fish stocks.