They said they were allowed to go because the local elders made a truce to prevent any other village soldiers from being killed.
I’d like to see the documentary and get all the facts.
I ended up going to the link to read whole thing at the Daily Mail. That place always loads slow for me. I bounced about what DM said against other sources. It looks like Wiki has a good write up about this.
The battle, the "Siege of Sangin" that took place from June to late August, 2006.
And the British called in support from A to Z - artillery from ground batteries and air:
Wiki: "Each attack was repulsed, as British troops posted on the DC rooftop directed fire from artillery, mortars and airstrikes from attack helicopters and jets against the Taliban, inflicting heavy losses."
The Daily Mail story centered on this compound where they directed fire support from the rooftops.
Wiki: "The "district centre" (DC), a run-down compound half a mile from the town centre, became a base for some 120 British troops. It also housed the local government offices, and an Afghan police force "
On July 16th, 2006 'Operation Mountain Thrust' came in to push back the Taliban in support of the besieged Brits.
Again from Wiki:
"200 British paratroops, supported by Apache helicopters, were inserted by Chinook into Sangin. In a concerted attack with the troops stationed there, they were able to break the siege of the District Centre. They were supported by 700 coalition troops, including American, Canadian, Afghan and Estonian forces. In a cordon and search operation, the town was sealed off and Taliban compounds were searched and cleared. "
https://en.wikipedia.org/wiki/Siege_of_Sangin
What I recalled came 4 years later after a lull for a while in Helmand Province where again the Taliban re-surged when Brits got replaced by the U.S. Marine.
"...The British troops withdrew on September 20, 2010 to be replaced by 3rd Battalion 7th Marines. 3/7 began aggressive clearing operations in July 2010. 3rd Battalion 5th Marine Regiment continued clearing operations in early October 2010. Members of 3/5 conducted clearing operations in the Sangin District of Helmand Province, Afghanistan..."
https://en.wikipedia.org/wiki/Battle_of_Sangin_(2010)
A note:
The 3/5 was E.B. Sledges' old outfit, who wrote the famous book With The Old Breed, that documented the brutal fighting at Peleliu and Okinawa during WW2 Pacific theater.