Leigh MP Andy Burnham has lost the Labour Leadership election to outsider Jeremy Corbyn.
Mr Burnham came second but with just 19 percent of the votes.
Our Political Reporter Daniel Hewitt was at the announcement in London.
Labour leader Ed Miliband will give his keynote speech later at the party's Conference in Manchester. Miliband is expected to pledge more funding to bolster the health service today as he unveils a 10-year plan to rebuild Britain.
There is widespread speculation the Labour leader will use his final conference speech before the general election to signal that money will be redirected to the NHS - and possibly to social care. But he will stress the party's commitment to fiscal discipline, insisting a "world class" country can be achieved without "big spending".
Doubling the number of people buying their first homes to 400,000 each year is among six "goals" being set out by Mr Miliband to help young people. Boosting apprenticeship take-up until it matches the number going to university, halving the number of low-paid workers and creating amillion new "green" technology jobs also form part of what the party is calling a "national mission".
Despite leading the opinion polls, the Labour pair continue to trail David Cameron and George Osborne over who is most trusted with the economy.
Mr Miliband is expected to dangle some immediate policy carrots before the electorate - with the NHS tipped to be the focus after Mr Balls told the Manchester gathering the party would do "whatever it takes" to protect it.
A "world class health and care service" is another of Mr Miliband's six stated 2025 goals - completed by raising the pay of "everyday" workers to ease the cost of living.
Should the north west be given greater political power to decide it's own future ?
Just one of the questions being asked at the start of the Labour Party conference which has opened in Manchester .
Our Political correspondent Alison Mackenzie reports.
Labour activists will gather today ahead of the start of the party's annual conference following Scotland's decision to reject independence.
Ed Miliband arrived in Manchester as Prime Minister David Cameron announced plans to ensure English MPs were the only politicians allowed to vote on issues that affect England.
But Mr Miliband said he wants a national debate on the issue of constitutional reform.
Any moves to restrict Scottish MPs' votes on English matters could undermine any future Labour Government.
The Labour event is due to begin with a women's conference as Deputy Leader Harriet Harman, shadow home secretary Yvette Cooper and shadow equalities minister Gloria De Piero all address activists.
The Labour Party will return to Manchester this weekend for its Annual Conference, an event which is expected to generate 25 million for the local economy. It's the 5th time it's been held in the city, Ed Miliband, the shadow cabinet and some 11,000 delegates and exhibitors will convene at Manchester Central from Sunday, 21 September to Wednesday, 24 September. It will mean a number of road closures:
From 7am on Thursday 18:
- Windmill Street, from Mount Street to Museum Street
From 7am on Saturday 20:
- Lower Mosley Street, from Great Bridgewater Street to Windmill Street
- Windmill Street, from Lower Mosley Street to Mount Street
- Mount Street, from Windmill Street to Peter Street
Restrictions will begin to be lifted on the evening of 24 September, and all of these roads will re-open Thursday 25 September morning.
Diversions will be sign posted. Access to the Manchester Central car park will be available during this time. Existing road closures will remain in place during the conference.
The North West Labour Party will be returning to the resort for its annual conference in November 2014. This is the fourth year the NWLP has headed to Blackpool and up to a thousand delegates and visitors are expected to attend the two-day event.
The conference will be held at the l Imperial Hotel – viewed by many as the heartland of British party politics having hosted every British Prime Minister since Winston Churchill.
Business tourism in Blackpool represents an average of £44 million in economic benefit to businesses in the resort each year.
An official request goes before the Commons today to find a replacement for the late Paul Goggins MP.
Voters in Wythenshawe and Sale East will go to the polls on February the 13th.
The 60 year old Labour MP died after collapsing while out jogging.
Applications for the Labour candidate to replace Paul Goggins as MP for Wythenshawe and Sale East have opened.
The 60 year old died earlier this month after collapsing whilst out jogging.
Mr Goggins had been the MP since 1997.
A long list of candidates will be drawn up tomorrow with a decision being made at a meeting of the local party by the end of the week.