David Cameron has left Afghanistan after what Number 10 sources said was a "good visit."
Mr Cameron was said to have been "very reassured" about the plans to withdraw British troops from the country.
It is reported he believes the deadline for withdrawal was fixed, but the transition itself was movable. It is expected that it will mostly take place after September.
The Downing Street source said the Government's biggest role now is to improve relations between Afghanistan and Pakistan.