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Jeremy Corbyn is being beaten by Nigel Farage on several leadership measures, an exclusive poll reveals today.

The Labour leader’s scores for being a capable leader, having good judgment and being someone people would turn to in a crisis have slumped over the past year, according to Ipsos MORI research for the Standard.

The crash will deeply alarm Labour MPs who have been told to get ready in case of an early election. The rise of Mr Farage raises the prospect of Labour being squeezed in Leave-voting heartlands. Key findings of the poll include:

Just 23 per cent think Mr Corbyn is a capable leader, down from 32 per cent in April last year. Mr Farage outscores him with 32 per cent, while Boris Johnson gets 33 and Jeremy Hunt 37.

Only 19 per cent think Mr Corbyn would be “good in a crisis”, down from 25 per cent. Mr Farage beats him with 28, Johnson gets 27 and Hunt 32.

A mere 21 per cent think the Labour leader has sound judgment — a fall from 31 per cent. Mr Farage beats him again with 30 per cent, while Johnson gets 27 and Hunt 36.

Mr Corbyn’s rating for being more honest than most politicians has toppled from a healthy 47 per cent to 32. Mr Farage is narrowly ahead with 34, Johnson gets just 25 and Hunt 31.

For patriotism, Mr Corbyn’s score is down from 44 to 39. Mr Farage is ahead of him with 55, while Mr Johnson is on 64 and Mr Hunt on 50.

Mr Corbyn seems to have had a personality bypass in the eyes of voters, with just 22 per cent saying he has lots of personality, down from 39 per cent. Mr Farage trounces him at 61 per cent. Mr Johnson outscores them all with 79, and Mr Hunt trails on just 18.

Under half (47 per cent) think Mr Corbyn, right, is out of touch with ordinary people, up from 39. Mr Farage also scores 47. Mr Johnson is deemed out of touch by 62 per cent and Mr Hunt by 53.

Only 22 per cent think Mr Corbyn has what it takes to be a good prime minister, while an overwhelming 68 per cent disagree. Among Labour supporters, the proportion who think he would be a good PM has gone up from 52 per cent in March to 60. Mr Farage’s score as a potential PM is almost as bad, with 24 per cent thinking he would be good and 63 per cent bad.

Gideon Skinner, of Ipsos MORI, said: “When he was up against Theresa May, Jeremy Corbyn’s public image was strongest on honesty, personality and being less out of touch, but his ratings have fallen on all of these, while remaining weak on factors such as being good in a crisis.

“This will all make it harder for him to capitalise against the new opponents he will have to face as May’s premiership ends. He is also behind on Brexit.”

Ipsos MORI interviewed 1,043 adults in Britain by telephone, June 21-25. Data are weighted. Details at ipsos-mori.com