London Mayor Sadiq Khan told media earlier on:
“Londoners should be aware that there will be additional armed and unarmed police officers on our streets from tonight in order to keep Londoners, and all those visiting out city safe.
“I want to reassure all Londoners, and all our visitors, not to be alarmed. Our city remains one of the safest in the world.
“London is the greatest city in the world and we stand together in the face of those who seek to harm us and destroy our way of life.
“We always have and we always will. Londoners will never be cowed by terrorism.
“Londoners should be aware that there will be additional armed and unarmed police officers on our streets from tonight in order to keep Londoners, and all those visiting out city safe.
“I want to reassure all Londoners, and all our visitors, not to be alarmed. Our city remains one of the safest in the world.
“London is the greatest city in the world and we stand together in the face of those who seek to harm us and destroy our way of life.
“We always have and we always will. Londoners will never be cowed by terrorism.