Sir Keir Starmer is the least popular Prime Minister since records began, a damning new poll has found.

Fresh data from pollsters at Ipsos has handed the PM a net negative 66 satisfaction rating – just as his party conference begins.

That figure places him below every person to have taken the job since Margaret Thatcher – with every PM since David Cameron receiving incrementally worse ratings at their lowest.

Just 13 per cent of Britons are satisfied with the way Keir Starmer is doing his job as Prime Minister, a backslide of six percentage points since June this year.

Nearly four in five people are dissatisfied at 79 per cent – handing him a net rating of -66, or the lowest satisfaction rating for any PM since 1977.

Ordered by time, the net satisfaction rankings read:

• Keir Starmer: -66 per cent;
• Rishi Sunak: -59 per cent;
• Liz Truss: -51 per cent;
• Boris Johnson: -46 per cent;
• Theresa May: -44 per cent;
• David Cameron: -38 per cent;
• Gordon Brown: -51 per cent;
• Tony Blair: -44 per cent;
• John Major: -59 per cent;
• Margaret Thatcher: -56 per cent.

The poll – which also ranked Rachel Reeves as the least popular Chancellor on record – also makes for grim reading for Labour more broadly.

It surveyed 1,157 British adults between September 11 and 17 – so before Andy Burnham began making waves over a potential leadership bid.

Gideon Skinner, the senior director of UK Politics at Ipsos, said the figures show “the scale of the task facing him ahead of the Labour conference”.

Mr Skinner added: “Labour’s issues are deeper than changes in personnel – they are losing votes to both left and right, with the public still pessimistic about the state of the economy, immigration and public services, despite his planned relaunch to put a renewed focus on delivery.”

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Ipsos found that 34 per cent of Britons would vote for Nigel Farage’s Reform UK.

Just 22 per cent would vote for Sir Keir’s Labour – the lowest figure since June 2009 among Ipsos polls.

A mere 14 per cent of Britons would vote for Kemi Badenoch’s Conservative Party, which is haemorrhaging voters to Reform.

“There is no sign of a revival for the Conservatives, who still bump along at the lowest vote share we have ever recorded for the party, raising further questions about Kemi Badenoch’s ability to cut through,” Mr Skinner said.

Thirty-nine per cent of Tory voters from 2024 would now vote for Nigel Farage’s surging party.

All three of the Conservatives, Labour and Liberal Democrats are holding on to around half of their 2024 voter base, at 47, 50 and 49 per cent respectively.

Reform, meanwhile, has kept 89 per cent of its voter base from last year’s General Election.

“Reform’s 12-point lead confirms the party’s strong performance this year, helped by ongoing public concern over immigration but also wider discontent over the state of the nation, allowing Reform to take on the mantle of change,” Gideon Skinner added.

“Nigel Farage is also viewed as the most capable Prime Minister, but in truth there is little enthusiasm for any of the party leaders, and while one of his strengths is the keen backing he receives from his own base, the rest of the public still have doubts.”