A man has been remanded in custody after appearing in court in connection with the suspected car bomb attempts in London and at Glasgow airport.
A Jeep was driven into the doors of Glasgow airport on 30 June
Iraqi doctor Bilal Abdullah, 27, was accused at Westminster magistrates of conspiracy to cause explosions.
He is the first person charged over the suspected attack attempts. The charge carries a maximum life sentence.
Meanwhile, police have been granted more time to question five of the six other people detained in the UK.
The sixth man, Kafeel Ahmed, is in a Glasgow hospital suffering from severe burns and another man is being held in Australia as part of the inquiry into the incidents.
Scotland Yard says the four men and one woman currently being questioned in the UK can be held for another week.
The Crown Prosecution Service said Dr Abdullah was being charged under the 1883 Explosive Substances Act.
The court clerk told Dr Abdullah: "The charge against you is that between 1 January and 1 July this year within the jurisdiction of the Central Criminal Court, you unlawfully and maliciously conspired with others to cause explosions of a nature likely to endanger life or cause serious injury to property in the United Kingdom."
Dr Abdullah was arrested at the scene of the airport attack
Dr Abdullah, who wore a white sweatshirt, spoke only to give his name and confirm his date of birth.
No application was made for bail. He will appear at the Old Bailey on 27 July.
He was arrested at Glasgow airport on 30 June after a Jeep was driven into the doors of the main terminal building.
Kafeel Ahmed, 27, from Bangalore, India, is still in a critical condition in a specialist burns unit at Glasgow Royal Infirmary after suffering 90% burns in the incident.
Although the UK has lowered its terror threat level from "critical" to "severe", police remain on high alert.
The other people being held include three doctors, one of whom is Dr Mohammed Haneef, an Indian national who was detained at Brisbane Airport.
Another is Jordanian Dr Mohammed Asha, 26, who was arrested along with his wife, Marwah Dana Asha, 27, on the M6 motorway.
Dr Sabeel Ahmed, 26, who is also from India and works at Halton Hospital in Cheshire, was arrested in Liverpool. He is the brother of Kafeel Ahmed.
The three can now be questioned by police until 14 July.
Two other men, aged 25 and 28 and thought to be medical students or doctors, were arrested at the Royal Alexandra Hospital, Paisley.
They can now be held by police until 15 July.