From the Daily Mail:
A young Muslim man is accused of attempting to buy guns and a suicide vest for an Islamic State-inspired massacre at Buckingham Palace.
Haroon Ali-Syed, 19, was arrested by counter-terrorism officers amid fears he was on the brink of committing an atrocity.
The IT student is also suspected of trying to contact a bombmaker to build a nail bomb, and researching an Elton John concert in Hyde Park which took place on Sunday to mark the anniversary of the September 11 attacks.
He is charged with planning to carry out an attack at a central London landmark, potentially Buckingham Palace or Oxford Street.
It is understood evidence against Ali-Syed was gathered in a joint operation between MI5 and Scotland Yard.
An undercover officer, posing as an extremist, infiltrated his circle and allegedly recorded exchanges of him preparing a terrorist attack.
Ali-Syed is accused of attempting to get hold of an improvised pressure cooker bomb built to instructions published online by Al Qaeda.