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Ed Miliband has sunk to a new low with just one in five voters saying he’s a doing a good job.

In a further blow to the Labour leader, a new Sunday Mirror/ComRes poll shows that under half (46 per cent) of voters for his own party rate his performance.

The revelation will pile pressure on Mr Miliband amid accusations that he has presided over a “summer of silence” among holidaying ­Labour MPs.

Overall, the poll shows Labour is up one point and now has a nine-point advantage over the Tories since our poll last month.

Labour now stands at 37% while the Tories are unchanged at 28%. UKIP, at 19%, equals its high point in our surveys and the Lib Dems are unchanged at just 8%.

But Mr Miliband has returned from his holiday in France to the news that his personal popularity has plummeted to its lowest ever level.

Just 22% per cent of voters rate him as a good Labour leader compared to 28% who think David Cameron is a good PM.

Mr Miliband’s “net approval” rating among all voters has plunged 17 points since May to -28, the lowest since we first asked the question in December 2010.

When it comes to Labour voters, one in four (25%) disagree that he is doing a good job as Labour leader.

Mr Cameron also saw his ­approval rating fall to -27, his lowest score for a year.

The revelations come as former Cabinet Minister Jack Straw yesterday became the latest senior Labour MP to call on Mr Miliband to “turn up the volume” and spell out more attention-grabbing ­policies.

But allies of Mr Miliband last night tried to shrug off the poll results. A senior Labour source said: “Ed is revitalised and refreshed. He is focused on preparing his speech to our party conference next month.”

- ComRes interviewed 2,001 adults online on August 14 and 15.