The fight for Norwich North is on a knife edge - but Labour could just edge it, a new poll suggests.

The latest Lord Ashcroft survey, published today, suggest Jessica Asato will be victorious and the key Norfolk marginal will turn red next Thursday.

But the 1,000-strong sample could have a margin of error of about 3pc, meaning the seat is too close to call between Labour and Conservative Chloe Smith.

It reflects the uncertain picture across the country, with a final round of polls suggesting 'mixed news' for the two main parties.

The peer, who is a former Norwich School student, said: 'After more than a year and nearly a quarter of a million telephone interviews, we have reached the final round of my general election constituency polling. The last ten surveys contain mixed news for all parties and some noteworthy results.

'I found Labour two points ahead of the Tories in Norwich North, only a very slight change from the one-point Labour lead recorded in the seat in February,' he said.