BBC News - Spending Review: David Cameron 'intervenes on defence' Spending Review: David Cameron 'intervenes on defence' The budget for the Ministry of Defence has been finalised after a personal intervention by Prime Minister David Cameron, the BBC has learned. Defence correspondent Caroline Wyatt said the MoD expected a 7% budget cut, but the Treasury raised this to 10%. However, the final figure is thought to be below 10% following Mr Cameron's intervention, our correspondent added. Mr Cameron felt defence chiefs should have "enough money to do their job", said the BBC's Adam Fleming. Details of spending cuts are due to be published next week. According to BBC political reporter Adam Fleming, a senior Downing St source claimed the review would not see any substantial cuts made to the number of Army personnel. The source said it would also see £750m saved over four years on Trident, although was not clear how those savings would be made. Mr Cameron had the "highest respect" for his defence chiefs, and had an "excellent relationship" with Defence Secretary Liam Fox, the source added. 'Can live with' There has been intense debate inside government about where the cuts should fall within the defence budget. Initial demands by the Treasury were for reductions of between 10% and 20%, with many options put before the National Security Council. Earlier this week it was believed at the MoD that a settlement was close at about 7%, but the Treasury came back demanding cuts of 10%. Military chiefs said that would damage the front line in Afghanistan, something Mr Cameron had previously made clear he was not prepared to do. Caroline Wyatt says that although the exact settlement figure has not been revealed, it is something the defence secretary "can live with". The BBC understands that both planned aircraft carriers, HMS Queen Elizabeth and HMS Prince of Wales, will be built - but the Royal Navy stands to lose a significant portion of its surface fleet, while the order for the joint strike fighters for the carriers will be scaled down substantially. The carriers are being constructed in sections in Scotland, Portsmouth and north Devon. It is believed that the Joint RAF/Fleet Air Arm Harrier force may face the axe, while some squadrons of RAF Tornado jets could be saved instead - although some air force bases will close. The Army may have to cut up to 7,000 or so personnel over the next five years, while the MoD itself could face substantial cuts to its civilian staff. Sources say £750m will be saved over four years on the Trident nuclear deterrent missile system but it is not yet clear how those savings will be made.