Armed police are to travel with passengers on London Underground trains following bomb alerts at North Greenwich station.
Police chiefs say they aren’t deploying patrols, but armed officers will use the Tube to get around, instead of cars, in the future.
“They will stand out and people will see them,” says Deputy Chief Constable Adrian Hanstock.
“We hope they will provide a reassurance that they are there and they are able to respond whatever the threat may be.”
The last time officers were deployed on the Tube was in the aftermath of the 7/7 bombings in 2005.
The Mayor’s spokesperson said: “No decision has been taken on this proposal. It will be discussed between the Mayor, BTP and TfL over the coming weeks.”