BRUSSELS (AFP) - British Foreign Secretary David Miliband warned Afghan leaders Monday that their next government must do more to defeat the insurgency and drive a wedge between the Taliban and its backers. He said any peace deals should only involve former militants who are prepared to shut out Al-Qaeda, and not use violence against troops or citizens in Afghanistan. He also sent a message to Afghanistan neighbour Pakistan, noting that any deal with former Taliban on both sides of the border should contain red lines. With Britain under pressure over mounting casualties, Miliband sought to reassure Britons about why British troops are on the front-line and called on other NATO countries to carry their share of the burden. The biggest shift must now be towards the Afghan state taking more responsibility, he said in a speech at NATO headquarters in Brussels, aimed mainly at the British public. Enduring capacity comes through the civilian side, with military support, and our aim in Afghanistan is transition, he said, in an hour-long address and question session focused on civilian, rather than military, efforts. Miliband called on the incoming government to weed out hardline insurgents from those Afghans involved in fighting for money, because they have no job or who are being coerced. We will not force the Taliban to surrender just through force of arms and overwhelming might, he said. The government with the help of the international community could do so, he said, by dividing the different groups, by convincing the Afghans that we will not desert them to Taliban retribution, and by building legitimate governance. But while Miliband emphasised that the Afghans should do more, he insisted that NATO allies must do their share of the fighting, by sending more troops and equipment and lifting conditions placed on the way forces can operate. We will play our part, but we want others to play their part too, he said. Burden-sharing is a founding principle of the alliance. It needs to be honoured in practice as well as in theory. Monitoring Desk adds: Miliband has said moderate members of the Taliban insurgency killing British forces in Afghanistan could be given seats in the Afghan government, reported Telegraph on Monday. He said some members of the broad coalition of militants, tribal groups and hired fighters could be drawn into the Afghan political process. Accepting that the Government needs to do more to explain the Afghan mission to UK voters, he again linked the conflict to British national security. The Afghan-Pakistan border is al-Qaedas incubator of choice he said. We need to be clear about what we are trying to do, clear about the challenges and the dangers that continue to endure. The badlands between Afghanistan and Pakistan are al-Qaedas incubator of choice. He said the area was generating one of the most deadliest threats that our citizens face. Miliband said it was important to make it clear that Britain and the US were not alone in their efforts in the region: I emphasise to the British people that there are 42 countries involved in Afghanistan. The British FM Miliband warned against any agreement with extremists in future. The operation was being conducted against militants on both sides of Pakistan-Afghanistan border, and no accorded would be struck with them in fture.