Shadow chancellor Ed Balls has said Labour would not vote for a "rushed" constitutional settlement that "would not work" in the wake of the Scottish referendum.

Asked how he would vote on the issue of English votes for English laws in the Commons, the frontbencher said he did not believe David Cameron would succeed in putting the question so simply without looking like a "charlatan".

He also stressed he wanted to avoid having two Parliaments, two prime ministers and creating a second class of MP.

Speaking at a Sure Start centre in Manchester ahead of his speech to the annual conference, he said: "When David Cameron promises some easy solution, I'm afraid he's having you on.

"The Government said last year don't rush this difficult question. Even Boris Johnson said today we have got to take our time to get this right.

"The idea that David Cameron is going to rush to some quick vote pretending there is a simple solution to a complex issue in our constitution, I think that would just be playing politics.

"Why doesn't he spend less time playing political games and more time trying to improve living standards for working people?

"I don't think he will find a way in which he can put a simple vote that doesn't make him look like a charlatan.

"In those circumstances, we are not going to vote for something that wouldn't work.

"We will see whatever is proposed but I have got to say we should do this carefully over the next year and a half.

"Not decided by William Hague in a cabinet committee, but listening to people up and down the country.

"What I want is a fair deal not just for Scotland and Wales, but for England too.

"And that means we need more power devolved in England. I want a fair distribution of monies across England.

"We should look at how we reform our UK Parliament and that is why we are saying let's reform our constitution carefully over the next two years. There is not an easy answer to that question.

"People have debated in our country for very many decades. I don't want to have two Parliaments - one for England and one for the UK. That would be hugely expensive. I think two prime ministers, some for some issues, some for others, I think that would be very difficult.

"I don't want a second class of MPs which would end up pushing Scotland and Wales out of our union, which would be perverse when we have just kept them in through last week's vote."

During the visit, which he attended with shadow work and pensions secretary Rachel Reeves, he met mothers and their children who use the service.

With his shirt sleeves rolled up, he got stuck in with the children as they played in the sandpit and with water. He also took time to paint a picture and enjoy a pretend cup of tea.

Meanwhile, Mr Cameron was hosting 20 Tory MPs at his country residence in Chequers in a bid to quell backbench unrest at the socalled "bribes" for Scotland.

Mr Balls was also asked about the series of measures he announced today, including the cap on child benefit.

He said: "We want to do more to make work pay to help families who have had a really hard time in recent years. That means more free childcare, raising the minimum wage, cutting taxes for working people.

"We have also got to show when the deficit is still big, we will balance the budget. We are not going to come along with uncosted promises, things people can't believe in. We will take difficult decisions in a fair way.

"We can't make the sums add up unless we say we are going to have to all make a contribution.

"I want child benefit to go up in the next Parliament, but for the first two years we will have to keep that rise to 1%."

Yesterday, shadow education secretary Tristram Hunt said Labour would end the "Tory attack" on Sure Start centres.