On the sixth anniversary of the start of war with Iraq on 20 March, Christian peace campaigners are planning to gather at Downing Street for a vigil.
A statement from the Fellowship of Reconciliation and Pax Christi said:
"We will gather: To remember the people of Iraq and Afghanistan. To pray for all those who have died over the past six years. To repent at the role our nation has played in this war. To call for peace with justice for the future of Iraq.
The vigil will include times of silence and times of public prayer. Participants are asked to wear black. They will gather on the south side of Whitehall, opposite Downing Street