Ring of steel (London)

From Wikipedia, the free encyclopedia
Jump to: navigation, search
The ring of steel was introduced in response to an IRA campaign of bombings in London, such as the 1993 attack on Bishopsgate (pictured)

The ring of steel is the popular name for the security and surveillance cordon including of a large number of CCTV cameras surrounding the City of London, installed in the 1990s to deter the Provisional IRA and other threats.[1][2] The term was borrowed from an earlier stage of the Troubles when the centre of Belfast was fortified against attacks; this fortified perimeter was known as the "ring of steel".[3]

Recent use[edit]

One of the checkpoints in July 2014 when it wasn't being actively used. The road narrowing and slowing of traffic are clearly seen

Following the September 11 attacks in the United States in 2001, and a reported increased terrorist threat to the United Kingdom, security was stepped up with occasional spot checks on vehicles entering the cordon, although not to previous levels.[2] In December 2003, the ring of steel was widened to include more businesses in the City.[2] This was as a direct result of a police report that categorised a terrorist attack on the City as "inevitable". Traffic entering the City is also monitored and recorded at the boundary of the London congestion charging zone, which covers a wider area.

History and purpose[edit]

The measures were introduced by Owen Kelly, then the City of London Police commissioner, following the IRA bombing campaign in London in the 1980s and early 1990s including attacks within the City such as the 1992 Baltic Exchange and 1993 Bishopsgate attacks.[2]

Roads entering the City were narrowed and small chicanes were created to force drivers to slow down and be recorded by CCTV cameras. These roads typically had a concrete median with a sentry box where police could stand guard and monitor traffic.[2] City planners call these types of precautions "fortress urbanism".[4] Some roads were closed to traffic entirely.[5] Despite the term "ring of steel", the roadblocks and chicanes were actually created with concrete blocks,[4] sometimes plastic coated, that were wedged together.

Initially the sentry posts were staffed by armed police almost continuously. The ring of steel consisted of plastic cones and on-duty police officers which the locals described as the "ring of plastic".[6] It served the purpose of providing a visible sign to the public that the City authorities were taking the threats of more attacks by the IRA seriously.[6] This was replaced by more permanent structures consisting of concrete barriers, checkpoints and thousands of video cameras.[4] Following IRA ceasefires the police presence was curtailed.

Attacks outside the ring[edit]

In 1996, the IRA attacked another area of central London by exploding a bomb at the Docklands, resulting in two deaths, 39 other casualties and £85 million worth of damage. The attack showed that while the ring of steel was able to hinder attacks inside the City itself, terrorists could instead target other high-value areas such as the Docklands or Westminster.

See also[edit]


  1. ^ City of London Police. "3.2.4 The automated number plate recognition (ANPR) system and the Corporation of London’s traffic and environment zone culminate in what is generally referred to and known as the ‘ring of steel’.
  2. ^ a b c d e BBC News (2003-12-08)
  3. ^ Coaffee (2004), p. 201 (pdf p. 2) first paragraph.
  4. ^ a b c Lipton (2005-07-24)
  5. ^ Coaffee, Jon (2003) p.176
  6. ^ a b Coaffee (2004), p.204 (pdf p. 5) second paragraph

External links[edit]