A Downing Street spokesperson said:
“The Prime Minister will host the leaders of Afghanistan and Pakistan at Chequers on Sunday and Monday as part of his ongoing efforts to help to strengthen Afghanistan-Pakistan relations, support an Afghan peace and reconciliation process and promote regional peace and stability.
“For the first time, we will bring together the political and security establishments from both Afghanistan and Pakistan, with Foreign Ministers, Chiefs of Army Staff, Chiefs of Intelligence and the Chair of the Afghan High Peace Council attending the meeting.
“Discussions are expected to focus on the Afghan-led peace process and how the Pakistanis and international community can support it. We also expect the Afghans and Pakistanis to make further progress on the Strategic Partnership Agreement they committed to in September.
“The Prime Minister initiated the trilateral last summer at the request of both parties. This will be the third meeting hosted by the Prime Minister, following meetings in Kabul in July and in the margins of the UN General Assembly in New York in September. The UK’s role has been to encourage ideas, identify areas of agreement and provide a forum for open dialogue.
“And this trilateral process sends a very clear message to the Taliban: now is the time for everyone to participate in a peaceful political process in Afghanistan.
“As the Prime Minister has set out previously, a stable Afghanistan is not just in the interests of Afghans, but also in the interests of their neighbours and the UK. We share the same vision for Afghanistan: a secure, stable and democratic country that never again becomes a haven for international terror.
“We are working together to achieve it and Afghanistan’s neighbours have a vital role to play. It is vital not just for the future security of their citizens, but for their prosperity too.”