A man arrested by British police last week in a co-ordinated sweep has been charged with conspiracy to cause explosions.
"Suspect A, a male aged 17, who was arrested on March 30th by officers from the Anti-Terrorist Branch has been charged this afternoon with conspiracy to cause explosions with intent to injure or damage property," police said in a statement.
The statement said the man would appear at Central London's Bow Street Magistrate's Court tomorrow, which will be sitting as a youth court for the occasion because of his age.
A total of nine men were held in the series of raids which also uncovered half a tonne of ammonium nitrate - a commercial fertiliser which can also be a key component in home-made bombs.
The men, all British citizens aged 17 to 32 and reported in the press to be Muslims of Pakistani origin, are being held at a high security London police station.
The other eight men are still being questioned after police were granted a detention extension today.
Under British anti-terrorism laws, police can apply for extensions to detain suspects for questioning for up to 14 days without charge.
Canadian police have confirmed that their arrest of a Canadian-born software developer was linked to the British arrests.
Scotland Yard said the UK raids were not linked to the March 11th attacks in Madrid that killed 191 people.