Dividing Iraq "no solution"
Browne also said: "Dividing Iraq into Sunni, Shia and Kurdish areas might appear seductive but it would not solve sectarian tensions.
"A divided Iraq would also threaten regional stability. Even without that division, Iraq is vulnerable to becoming a crucible for wider regional tensions.
"It is vital now that Iraq's neighbours give it full support and undivided support.
"Even Syria, whose motives the international community has often had cause to question, has shown signs of constructive engagement."
Margaret Beckett, the British foreign secretary, said last week that Britain may be able to hand over security responsibility in Basra by the spring.