New 'Ring of Steel' planned for London Square Mile
A new "ring of steel" costing £5m has been proposed to protect the skyscrapers in London's "Square Mile" from terrorist attack.
Manned checkpoints, rising street bollards and crash-proof barricades are among the measures proposed.
It follows advice from MI5 and counter-terrorism police.
A Corporation of London report said they "had identified that the area was highly sensitive to... a hostile vehicle-borne security threat".
The advice comes in the wake of the Berlin Christmas market terror attack on Monday in which Tunisian Anis Amri, drove a lorry at shoppers, killing 12 and injuring 49 people.
The ring of steel is believed to be the best way to protect the heart of London's financial district.
London's first ring of steel was a response to IRA bombs in the Baltic Exchange in Bishopsgate in 1992.
It would be the first time since the late 1990s that manned checkpoints were used.
Such checkpoints were phased out after the IRA announced a ceasefire in 1994.
The new protective ring will border Liverpool Street, the Bank of England and Fenchurch Street - an area which is home to some of the capital's newest and most recognisable skyscrapers.
"This eastern section of the City of London is especially of importance in as much as there are going to be a number of major landmarks developed around the area that could be of interest," the report said.
The new plan would be subject to a consultation but could be fully implemented by 2022.
Will Geddes, founder of International Corporate Protection said: "Although we've seen of late 'lo-fi type' attacks, like the Berlin Christmas market where a lorry that was hijacked and driven into a crowded area, we cannot discount the type of attack that will... include a large truck packed with explosives"