Theresa May and Jeremy Corbyn are both behind 'don't know' in a new poll asking voters who would make the best Prime Minster.

Mrs May has slipped in the popularity stakes since her disastrous conference speech, which was disrupted by a prankster, a coughing fit and the set collapsing.

She is now neck and neck with Jeremy Corbyn with 33 per cent of voters saying she makes the best PM while the Labour leader has the exact same level of support.

But they were beaten into second best by 'not sure' which got the backing of 35 per cent of those polled.

Theresa May and Jeremy Corbyn were both beaten by 'don't know' in a new poll about who would make the best Prime Minster

The findings, published today, suggest voters are fed up with the current crop of political leaders.

It will pile further pressure on Mrs May, who faced a fresh onslaught of criticism and questions about her leadership in the wake of the calamitous Tory conference last week.

The poll, commissioned by The Times newspaper, found that Mrs May had fallen three points since her conference shambles last week.

While the Labour leader's popularity remains unchanged at 33 per cent - suggesting he has failed to capitalise on her woeful performance.

Nearly a quarter (23 per cent) of those who votes Tory in the June snap election said they do not know who they think would make the best PM.

And Mrs May has been deserted by voters who backed staying in the EU in the Brexit referendum, the survey shows.

Theresa May and Jeremy Corbyn (both pictured on separate visits yesterday) appear to have left voters less than impressed given the poll's findings

Theresa May, pictured being confronted by a prankster who gave her a fake P45 during her conference address last week, has seen her popularity slip since the calamitous performance

Less than a fifth (18 per cent) of remain voters say she is their choice of PM while half (49 per cent) said they would pick Mr Corbyn, and a third (33 per cent) said they were not sure.

Women are more likely to back to Labour leader, with 33 per cent picking him as the best Prime Minister compared to 30 per cent who chose Mrs May.

Labour is still marginally ahead of the Tories in the poll, with 42 per cent backing the reds and 39 per cent backing the blues.

But the Tories are still better trusted on the economy, defence and negotiating Brexit, the poll found.

Some 33 per cent of voters trust the Tories most on the economy against 23 per for Labour, 26 per cent trust them on exiting the EU, over 18 per cent who chose Labour, and 35 per cent prefer the Tories on defence compared to 19 per cent who opted for Labour.

Labour are ahead on which party is best to deal with unemployment, housing, the NHS and education. YouGov interviewed 1,680 adults on October 10 and 11

The poll also showed that despite the onslaught of gloomy predictions on Brexit, the overwhelming majority of Leave voters (86 per cent) think they made the right decision.