Campaigners have announced they will stage an emergency protest calling for British troops to be withdrawn from Afghanistan.
The Stop the War coalition called for the action following heavy losses suffered by UK troops fighting the Taliban.
With eight soldiers killed in the space of 24 hours, protesters will gather at Downing Street between 5pm and 7pm on Monday to urge the Government to pull troops out of Afghanistan.
A spokesman for the group said: "The troop 'surge' which was meant to pacify Helmand province has become a nightmare for the British army.
"This unwinnable war must stop now.
"All British troops must be withdrawn to prevent any more futile deaths, and to stop the carnage suffered by the Afghan people."
The coalition, along with Media Workers against the War, will then host a public meeting - The good war? Afghanistan in the media.
The event will take place at the Friends Meeting House in Euston Road, north-west London, at 7pm on Monday.
Guardian journalist Seumas Milne, photojournalist Guy Smallman, who has recently returned from Afghanistan and Stephen Grey, an investigative journalist embedded with British troops in Helmand, are among the speakers.
