David Cameron has indicated he wants to serve in No 10 until 2020 as he prepares to unveil a review of how the Coalition has performed.

The Prime Minister has also warned Tory critics of the power-sharing government to "stop complaining" and insisted he would not row back on same-sex marriage, child benefit cuts for the wealthiest and overseas aid commitments, according to the Sunday Telegraph.

Asked if he would stay as Prime Minister until 2020, he told the newspaper: "Yes - look, I want to fight the next election, win the next election and serve - that is what I want to do."

Mr Cameron and Deputy Prime Minister Nick Clegg will publish a review on Monday of progress the Coalition government has made since 2010 and set out its top priorities for the rest of their term. Mr Cameron told the Sunday Telegraph: "This is an enormous reform agenda and that's enough to keep us all busy."

The review is expected to include details of a cap on social care costs, which ministers have considered setting at £75,000, as well as pension and child care reforms. "In mid-term in government you are taking difficult decision, there's always going to be a tendency for people to look at protest," the Prime Minister added. "I don't think my job is to try to identify different segments of people who going his way or that. My job is to steer the ship in the right direction."

Mr Cameron admitted the Government could have promoted its same-sex marriage reforms, which have angered many Tory backbenchers, better.

"One of things we haven't got across properly is this is what is going to happen in the register office," he said. "This is about what the state does, this is the civil part of marriage. We're not changing what happens in church or synagogue or mosque."

Mr Cameron, who is due to make a keynote speech on Europe in the coming weeks, said: "Britain has a role in Europe ... but we're not happy with the way the relationship works at the moment and so we want change."

The Conservative leader insisted he understood the impact cuts to child benefit for the top 15% of earners, which come into effect on Monday, would have. "Look, I have complete understanding for people who are having their family budgets changed and money taken away and if there is more we can do to make it easier for people, yes of course."

Labour's vice chairman Michael Dugher said: "Another year, another relaunch and still none of the change that David Cameron and Nick Clegg promised... Families who put their trust in David Cameron and Nick Clegg's promises of change will be bitterly disappointed to see that another relaunch is all they are offering."