Dan Hardie wants to know what is happening in the area between the southernmost US troops in Iraq - around Najaf if memory serves - and the northernmost British, now that the withdrawal to Basra Air Station is complete. Call it the grey zone - the populous, Shia-dominated gap astride the main supply route to Kuwait. left after the first Shia rising of spring, 2004 intimidated most of the old MND(SC). He refers to a New York Times story describing the engagement of "US-led" forces in the Amarah-Majjar al-Kabir area, familiar to millions as the site of the RMP's last stand in 2003 and the long fight between Camilla's Killers and the Sadr movement in 2004-5.
I'm quite sure the BBC described the same action as "British and Iraqi forces", though. I suppose that, as they are all serving under a US higher command, any coalition forces are "US-led", but that is a pedantic point. When the British infantry battalions in Amarah and Dhi Qar provinces withdrew last autumn, followed by the Australians moving from Muthanna province to Tallil air base near Nasiriyah, two "overwatch" battle groups were formed, one for each area.
Their title and composition (primarily armour/cavalry) suggests that their mission was to provide a tactical reserve for the Iraqi government units in this areas. I am not exactly informed if they still exist, and if so what contact they have with the main body of troops outside Basra. But given that the reinforcements are gone, and the force is now down to a brigade plus extra logistics (as planned for mid-2003), I doubt it.