Politics dominates the front pages this Sunday morning.Both the Mail and the Express claim that a challenge to Gordon Brown is on the way.

Stalking horse to take on Brown says the Mail

The threat to Gordon Brown's survival as Prime Minister intensified last night with the revelation that a Labour MP is preparing to mount a 'stalking horse' leadership challenge against him.
Left-winger John McDonnell has told friends he is ready to try to topple Mr Brown following Labour's disastrous showing in Thursday's local elections.

MILIBAND URGED TO DEPOSE BROWN says the Express

DAVID Miliband was last night being urged to challenge Gordon Brown for the Labour leadership to save the party from meltdown in a general election.
The Foreign Secretary, reported to be holding a weekend “summit” with allies at his country retreat in Chevening, Kent, is seen by many as Labour’s best hope of heading off David Cameron’s resurgent Tories.

The Sunday Times meanwhile says that

Gordon Brown faces new 10p tax rebellion

GORDON BROWN was warned last night that he faced a second election disaster unless he made further concessions in the row over the abolition of the 10p income tax band.Brown is meeting advisers at Chequers this weekend to devise a “relaunch” aimed at seizing back the political initiative. The prime minister and his aides are drawing up an urgent rescue strategy focused on restoring his reputation on the economy

A story also taken up by the Observer which says

Gordon Brown is poised to scrap a series of unpopular tax rises as part of sweeping changes to stave off a dangerous revolt over the rising cost of living which last week dealt Labour its worst electoral hammering in 40 years.
Today the Prime Minister will respond to a growing suburban uprising by signalling moves to help motorists and other consumers. His intervention comes amid a fresh assault over the 10p tax rate change, which backbenchers warn could destroy his premiership.

Both the Telegraph and the Independent meanwhile look at the new mayor of London

Boris Johnson's Tory revolution plan revealed says the former

The new Mayor, who defeated Labour's Ken Livingstone, will within days pour more police on to the capital's crime-hit streets, and plans to introduce hand-held weapon scanners and knife-detecting "arches" at Tube and railway stations.
He will also move to slash immediately wasteful spending and bureaucracy and order a review of the capital's controversial congestion charge.

The odd couple says the Independent claiming that

Behind the smiles and triumphant back-slapping that accompanied Boris Johnson's victory this weekend, David Cameron is privately uneasy that the new Tory Mayor of London could derail his chances of becoming Prime Minister.
Mr Johnson's performance as the most powerful elected Conservative in Britain since John Major's 1992 victory could decide the outcome of the next election and shape the course of politics for the coming decade.

The Mail reveals

After weeks of biting his tongue, Boris Johnson celebrated his election as Mayor of London yesterday by finally giving vent to his feelings.
Shrugging off his minders – who had feared that one of his gaffes would derail his bid to topple Ken Livingstone – Mr Johnson relaxed with his first alcoholic drink in three months and launched a colourful attack on critics of his subdued campaigning style.
"I am just totally fed up with this artificial distinction...this sort of Arian controversy about the old Boris and the new," he said.

The political stories share contined coverage of the Austrian cellar,the Mirror leads with He chained her up for nine months

'My father chose me for himself' says the Observer

They won't have told her yet; it is much too soon. Any hopes that Elisabeth Fritzl may have of living a normal life with her children, funded by compensation from the father who imprisoned and repeatedly raped her, will be in vain.
Yesterday it was revealed that Josef Fritzl, the 73-year-old grandfather who incarcerated Elisabeth in a dank dungeon for 24 years beneath the family home and fathered her seven children, is financially ruined, with millions of euros in debts.

The Family Man of Amstetten says the Independent

He was a very good family man, was Josef Fritzl. In his home town of Amstetten just eight days ago, they'd have been adamant about that. Hadn't he brought his seven children up to be good boys and girls? Always so polite; just like their father. And when that silly daughter of his ran off to join this religious cult, had he bothered people with lots of questions about who she'd been seen with recently? No. Even when the little hussy had three children and just dumped them on his doorstep, did he complain? No. He just took them in and raised them as if they were his own. And he was always so smart. He had pride, did Fritzl. He really was a very good family man.

The News of the World says

A LODGER at the home of dungeon sex slave Elisabeth Fritzl has sensationally revealed he knew her dad was raping her.Joseph Leitner also told how Elisabeth fled home at 17 but was found by father Josef—a year before he imprisoned her.
Leitner, who rented a room from Fritzl, claimed: "I knew Sissi (Elisabeth's nickname) was being raped by her father before she disappeared.

'Pray like mad for Madeleine' reports the Telegraph

Madeleine McCann's mother has asked the community to "pray like mad" during a church service to mark the first anniversary of her daughter going missing.Mrs McCann also expressed her gratitude to the congregation during a 30-minute service at St Mary and St John church, near their home in Rothley, Lancashire, thanking them for their prayers and support

The Mail adds

Appearing fragile after a week-long media blitz to publicise the hunt for her child, Kate had held her head down for much of the service at St Mary and St John, in Rothley, Leicestershire.
Gently sobbing at times, she appeared a broken figure, one year on to the day her then three-year-old went missing from Praia da Luz, Portugal.

The Observer reports that

A 15-year-old boy was stabbed to death in south London early yesterday morning less than a mile from where Damilola Taylor was murdered in similar circumstances eight years ago. Lyle Tulloch, from Peckham, was attacked in a stairwell at Newall House on Harper Road, Southwark, and died at the scene.
The killing took place only hours before London's new mayor, Boris Johnson, promised to tackle violent crime. He described the boy's death as tragic, saying: 'I think this problem with kids growing up and getting lost in tragic and self-destructive choices is the number one issue we face in this city.' Lyle's death brings to 12 the number of teenagers murdered in the capital this year

According to the Times

Ex-BA boss condemns Heathrow expansion

BOB AYLING, former chief executive of British Airways, has attacked plans to expand Heathrow airport as a “costly mistake” that is “against Britain’s economic interests”.
His opposition to the proposal for a third runway strikes at the heart of the government’s case that it is essential for the health of the country’s economy.
Ayling, who headed BA from 1996 to 2000, is the first significant figure from the aviation industry to come out against plans that could double Heathrow’s number of passengers from the current 68m.

The Telegraph reports that

Thousands of elderly abused in care homes

The first ever audit of calls to England's social care watchdog shows that more than 1,000 were made in just six months by people who suspected their relations or friends were being abused by care workers.
Social services chiefs estimate that a further 60,000 "alert calls" are made directly to local councils every year.

Betrayed: The Iraqis who risked all for Britain says the Independent

Sami Faleh Mohammed was one of thousands of exiled Iraqis who after the invasion of Iraq decided to give his country another chance.
In September 2004 he led his wife and three children from the safety of Jordan to Basra, where he found work as a translator for the British Army. Two years later he was dead, murdered by members of the Shia militias who have targeted Iraqis who risk their own lives to help the British try to bring stability to the region.
His case is now one of 12 test claims being brought in the High Court by Iraqi translators and other workers who believe they have been betrayed by Britain. Many more are still in hiding, under sentence of death after being branded "collaborators and spies" by the militias.

The Times meanwhile reports from Sadr city where a

clash between titanic powers which has killed 935 people and wounded 2,605. Even by the callous standards of Iraq’s cruel war, this is a ruthless struggle. Most of the dead and injured have been civilians.
On one side is the Iranian-backed Mahdi Army of the radical Shi’ite cleric, Moqtada al-Sadr, which is defending Sadr City, its biggest stronghold, with a resilience it failed to show when it ceded parts of the southern port of Basra last month.
On the other is the American-backed Iraqi army of the prime minister, Nouri al-Maliki, which launched an offensive on March 30 with the aim of seizing control of the city but which took only one southern district before its advance was halted.

Many of the papers report

Thousands flee as Chilean volcano erupts

Terrified citizens of the fishing town of Chaiten, six miles from the volcano, described a noise like a seismic "water boiler", and spoke fearfully of a series of earth tremors lasting hours.
A sea rescue was under way on Saturday for people threatened by the eruption.
"All the people must go away by boat this morning," said Maria Lynam, 58, who runs a small hotel in the town

The Telegraph reports

Four Britons on plane lost over Brazil

The men, all tourism investors, are said to include one claiming links to Prince Albert of Monaco.
The Foreign Office confirmed that Alan Kempson, Sean Woodall, Ricky Every and Nigel Hodges were on board. A spokesman said: “I can confirm there were four passengers, all four of whom were British, and two pilots.”
Their twin-engine Cessna 310 disappeared eight miles off the coast minutes before it was due to land in the city of Ilheus. They were on a 125-mile flight from Salvador, operated by Aero Star, an air taxi firm.

Staying in South America and the Observer reports on

Revolt against the peasant president

The tide of left-wing and indigenous movements sweeping to power across South America is about to hit a wall of resistance. In country after country the old order has collapsed, ending decades, and in some cases centuries, of rule by white elites. Their time is supposed to be up. Santa Cruz, however, did not get the memo. Hundreds of thousands of people in this wealthy lowland region of Bolivia are expected to vote for autonomy today in a referendum seen as a repudiation of the so-called "pink tide".

Back to the UK and the economy continues to get coverage,the Express reporting that

HOUSE sales are falling through at three times the rate they were two years ago, the latest research shows.
Almost half of agreed sales fail to survive to completion, according to a leading property buying specialist.
Quickmovenow says the reasons for this include a loss of confidence in the market – where prices are falling at their fastest for 15 years – difficulty in obtaining mortgages and problems with valuations.

Filling up costs £2 extra in South East says the Telegraph

Campaign groups criticised the difference in prices last night, claiming that drivers were not getting a "fair deal".
Using information provided by the petrol price comparison website petrolprices.com, The Sunday Telegraph compared prices in 20 towns and cities across Britain

The Independent reports that

Multinationals make billions in profit out of growing global food crisis

Giant agribusinesses are enjoying soaring earnings and profits out of the world food crisis which is driving millions of people towards starvation, The Independent on Sunday can reveal. And speculation is helping to drive the prices of basic foodstuffs out of the reach of the hungry.
The prices of wheat, corn and rice have soared over the past year driving the world's poor – who already spend about 80 per cent of their income on food – into hunger and destitution.

Meanwhile the Observer reports

The European Union is preparing plans to allow pig remains to be used to feed poultry. The practice - banned in Europe after the BSE crisis 10 years ago - would save farmers millions of pounds as prices of cereal feed for chickens soar, say officials in Brussels.
But the proposal has outraged animal rights campaigners, Muslim organisations and other groups. They claim the move would put families at risk, offend religious sensibilities and lead to a major consumer backlash.

The News of the World leads with

Peaches Geldof in drug deal video

POLICE are to quiz Sir Bob Geldof’s daughter Peaches after she was filmed buying DRUGS from Amy Winehouse’s alleged dealer.Peaches, —who has always denied using cocaine like her tragic mum Paula Yates—was found by cops on the SAME video in which Winehouse, 24, was caught snorting crack.
As the secret video camera whirrs, she hands a drugs pusher up to £190 and says: “I’m going to need Valium tomorrow after this.”

Finally the Times reports

Jimmy Savile fixed it for warring royals

AS the host of television’s Jim’ll Fix It, Sir Jimmy Savile’s task was to fulfil the wishes of a generation of children. It’s amazing he found the time because, he now says, he had a parallel career as Middle East troubleshooter, confidant of Margaret Thatcher and mentor to the Prince of Wales.
Savile, 81, has decided to break his silence to reveal that, like the Hollywood innocent Forrest Gump, his eventful life has been touched by history.
He describes meeting the president of Israel who invited him to address the country’s cabinet. He was asked by Prince Charles to keep Sarah Ferguson, then married to Prince Andrew, out of trouble. He also spent “11 consecutive Christmases at Chequers” with the Thatchers.