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David Cameron said he was focussed on the economy after the rows within his party on Europe and gay marriage.
The Prime Minister told BBC Radio 4's Today programme that it was "right" to tackle the issue of same-sex marriage and claimed there was a "high degree of unity" amongst the Conservative party on Europe.
David Cameron said he believed the terms of UK's membership of the European Union would be successfully renegotiated, during an interview with BBC Radio 4.
The Prime Minister said his policy on Europe was the "boldest", "clearest" and "most straightforward" a leader has had for 30 years.
Mr Cameron added: "I don't accept the narrative that says the only way Britain can succeed is to pull up the drawbridge."
A Department for Environment, Food and Rural Affairs (Defra) spokeswoman said "everyone has a role to play" in protecting the UK's wildlife:
Losing even one species is one too many. That's why we're doing more to improve the natural environment than ever before.
We have already invested £7.5 million to create 12 new Nature Improvement Areas and established 48 Local Nature Partnerships.
Everyone has a role to play in protecting and encouraging wildlife for future generations.
The Prime Minister told Total Politics magazine that the coalition was the best way to get things done but "if that wasn't the case then we'd have to face the new circumstances in whatever way we should."
The Deputy Prime Minister will say: "He echoed exactly what both of us have always believed: this coalition has been remarkably radical; it still has work to do; and the best way for us to serve and improve Britain is by finishing what we started.
"I am absolutely committed to this coalition lasting until 2015 - as is the Prime Minister."
Claims that it was in either or both parties' interests to "prematurely pull the plug" were wrong, he will suggest.
Speaking to The Times (£) Afghan interpreter Mohammad Rafi Hottak welcomed the Government's decision, adding it would save lives.
– Mohammad Rafi Hottak
It has been late in coming but finally the Government has made the right decision.
They have honoured the services of the Afghan interpreters.
This decision will save lives that are currently at risk. It will also send a message to the Taliban and the terrorists that the Afghan interpreters are not left alone to be persecuted.
Sir David Attenborough, who is launching the Study of Nature report, called it a "stark warning" but also "a sign of hope".
Sir David said: "For 60 years I have travelled the world exploring the wonders of nature and sharing that wonder with the public. But as a boy my first inspiration came from discovering the UK's own wildlife.
"Our islands have a rich diversity of habitats which support some truly amazing plants and animals.
"We should all be proud of the beauty we find on our own doorstep; from bluebells carpeting woodland floors and delicately patterned fritillary butterflies, to the graceful basking shark and the majestic golden eagle soaring over the Scottish mountains.
Dr Mark Eaton, a lead author on the State of Nature report, said it reveals wildlife in the UK is "in trouble" and that overall "we are losing wildlife at an alarming rate".
More than 750 species assessed on international "Red List" criteria, which measures the threat of extinction, are at risk of vanishing from the UK altogether, the experts warned.
The abundant wildlife of the UK's Overseas Territories is also under threat, with 90 species at a high risk of global extinction.
More than three-quarters of 155 species of birds, animals, butterflies and moths which are considered a priority for conservation action - including some of the country's rarest and most vulnerable wildlife - have seen declines in the past 40 years.
Species which rely on particular habitats have fared worse, and the declines in wildlife come against a background of massive loss of natural habitats in the past two centuries, including lowland heathland, lowland meadows in England and Wales and Scotland's blanket bog.
Andy Murray has withdrawn from the French Open after failing to recover from a back injury and will now switch his focus to being fit for Wimbledon in a month's time.
The British number one met with medical specialists on Monday to see if he could take part in Roland Garros but eventually decided to skip the clay-court event.
The world number two said in a short statement: "It's a really tough decision and I love playing in Paris, but after seeking medical advice, I am not fit to compete.
"Apologies to the organisers and thanks to everyone for the messages of support. Now my complete focus is on getting back on the court as soon as possible."
– Downing Street STATEMENT
The Prime Minister has been very clear that we should not turn our backs on those who have trod the same path as our soldiers in Helmand, consistently putting their lives at risk to help our troops achieve their mission.
We should recognise the service given by those who have regularly put themselves in real danger while working for us.
These proposals give them a choice: the opportunity to go on working in Afghanistan, learning new skills and to go on rebuilding their country or to come and make a new start in Britain.
Wildlife in the UK is "in trouble", with almost 2,000 species of birds, animals, insects and plants known to have declined in the past half century, experts warned.
Some 60% of the 3,148 British species studied have seen a reduction in numbers or range, with 31% suffering major declines, according to a report released by a coalition of conservation and research organisations.
Well-loved species from skylarks to hedgehogs are struggling in the face of threats that include loss of habitat, humans' management of the countryside and the increasing issue of climate change.
Almost three-quarters of butterfly species have declined in the past decade, plants are going extinct from some counties at a rate of one every other year and the UK has lost around 44 million breeding birds since the late 1960s, the State of Nature study found.