There has been a sense for some weeks that they have been looking for a way out, and one interesting feature of the deal which has been emerging this weekend is the extent to which it concentrates on public security measures like CCTV cameras, speed ramps and police patrolling.

BBC: Twelve depressing weeks

"I will be speaking to Denbighshire council and the local housing association tomorrow about the possibility of installing CCTV in the area for added security, " he said.

BBC: Vehicles damaged after 'explosion' in Denbigh

West Midlands Police will be reviewing CCTV footage from the scene, and security at the compound will be stepped up, a spokeswoman said.

BBC: Wolverhampton Meals on Wheels vans targeted by thieves

He told CNN that there needed to be greater investment in random searches by agents with explosive trace detection equipment and greater deployment of CCTV cameras, saying the extra investment needed in mass transit security amounted to a fraction of the economic cost of a successful attack.

CNN: SHARE THIS

The British Library has since improved its security as a result of this case, with a "massive" increase in its CCTV cameras, and in the number of staff who walk around the library's reading room floor.

BBC: The thief who stole pages from history