The first pictures have emerged of the man accused of attacking Tube passengers in Leytonstone on Saturday night.
Suspect Muhaydin Mire, 29. appeared in custody at Westminster Magistrates Court on Monday morning accused of the attempted murder of a 56-year-old man.
The attack on Saturday night sent terror fears rippling around the capital, with witnesses reporting the attacker shouted "this is for Syria" and "all your blood will be spilled".
Following the attack, extra uniformed and undercover police, backed by a growing force of armed officers, have been drafted in to protect London’s underground network.
And the incident has raised serious questions about how London would respond to a large-scale terror attack.
One former commander said it was alarming that armed officers were not at the scene on Saturday.
John O'Connor, a former commander of London's elite police unit, the Flying Squad, said: “It is alarming. We should have thought about this years ago.
"We still rely on the first people on the scene having to deal with a situation, whoever they are, whether a uniform officer or firearms officer.”
Mobile phone videos of the attack appeared to show a man with a knife confronting several people in the station before attacking the victim and slashing his throat. A large pool of blood could be seen on the station floor as terrified passengers, including children, fled in tears.
As the man was arrested, a passer-by was heard telling him “You ain’t no Muslim, bruv” - a rallying call which was picked up across social media throughout Sunday.
