**The foreign secretary is expected to focus on how the international coalition can win its mission in Afghanistan in a speech to Nato.**David Miliband is believed to be keen to outline the need to support the Afghan government, alongside the continuing military mission.
July has been the deadliest month for the UK and Nato since operations began.
The UK on Sunday pledged £225m in aid to the Afghan government, to try to undermine the heroin trade.
Announcing the package in Kabul, International Development Secretary Douglas Alexander said the UK was committed to securing a “stable and democratic future for the people of Afghanistan”.
He added that the military operation against the insurgency was “only part of the solution”.
Mr Alexander is due to arrive in Helmand province on Monday, where UK soldiers have been engaged in Operation Panther’s Claw to capture and hold land previously in Taliban hands.
The operation has led to the deaths of 20 British soldiers in the past four weeks.
US troops have also seen a rise in casualties, while parts of Afghanistan that have been mostly peaceful have seen an upsurge in violence.
Wave of attacks
Other Nato forces such as German troops - mainly engaged in training and reconstruction - have been drawn into offensive action.
A wave of Taliban attacks over the weekend left 22 dead, including insurgents, a foreign soldier and two Afghan soldiers, authorities said.
The Nato-led International Security Assistance Force (ISAF) said a Nato soldier “died of wounds suffered in a hostile incident” on Saturday, but did not confirm his nationality.
Meanwhile a roadside bomb in the Herat province wounded four Italian soldiers.
There are about 90,000 foreign soldiers currently deployed in Afghanistan.
Large numbers are being moved to the troubled south of the country ahead of the elections on 20 August.
So far in July, 67 international troops have been killed, bringing the total number of coalition deaths in 2009 to 223.