ITV News understands that Britain's withdrawal from Afghanistan may be speeded up with troop numbers almost halved in the next year.
During a video call, the Prime Minister and US President Barack Obama agreed the plan for all combat troops to leave by the end of 2014 was "on track". It could mean more opportunities emerge for service personnel to be brought home over the next 12 months.
During an hour-long conversation Downing Street says David Cameron also discussed Syria, Iran and the Middle East Peace Process with President Obama:
David Cameron is expected to make a statement to MPs on Afghanistan later today. ISAFcommanders in the country have reportedly been giving optimistic reports of progress by Afghan security forces.
- The UK contingent force is being reduced from 9,500 to 9,000 before this Christmas
- There is speculation it could be cut to around 5,000 after next Summer
- The US currently has around 60,000 troops in Afghanistan, after withdrawing around 23,000 this year