Bank of EnglandA new independent Bank of England committee with the power to limit the size of mortgages offered to homeowners has moved a step closer to coming in to force.

The Financial Policy Committee will be able to determine the value-to-loan ratios on mortgages, as well as tell banks how much capital they must hold, as part of the Government's efforts to prevent another banking crisis.

Its sweeping powers were announced as Chancellor George Osborne told the Commons the details of the Financial Services Bill, which aims to stop the building up of credit bubbles that led to the meltdown in 2008.

The Bill received an unopposed second reading after Mr Osborne told MPs the committee would "affect the bread and butter of people's daily lives".

But he said value-to-loan ratios could also be lengthened by the new influential committee if it wanted to offer the housing market a stimulus.

Shadow chancellor Ed Balls said Labour wanted to offer "constructive proposals" for the legislation but added the Bill fell "well short in its current form of being fit for purpose".

His comments came as Mr Osborne said the committee, which will assume responsibility for "monitoring risks across the system", would be chaired by the Governor of the Bank of England, telling MPs its job would be to "moderate a credit boom and alleviate a credit bust".

Mr Osborne said it could "alter the maximum loan-to-value ratios in mortgage lending to curb a sharp, unsustainable rise in house prices", adding that it would be completely independent of ministers. The Bank of England would now become the "single point of accountability for financial stability, ensuring there is a decisive answer to the question about who is in charge", MPs heard.

The committee would be "entrusted with the stability for the whole financial system", the Chancellor told the Commons, adding: "Its job will be to identify bubbles as they develop, spot dangerous interconnections, warn about poorly understood financial instruments and take action to stop excessive levels of debt building up before its too late."

The committee would reduce "systemic risks" in banking, he told MPs, adding that a "tripartite" regulatory system - led by the Bank of England, Financial Services Authority and the Treasury - had helped to create the meltdown which led to the multibillion-pound, taxpayer-funded bailout to rescue Britain's banks in 2008. But in the event of a financial crisis, MPs were told, the Chancellor would keep hold of the powers needed to put together a rescue package.