A man and woman have been arrested at Heathrow Airport on suspicion of committing terrorism offences after arriving on a flight into the airport.
The arrests are part of an investigation into travel to Syria in support of alleged terrorist activity.
Officers are searching two addresses in east London under the Terrorism Act in connection with their inquiries.
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Jade Dunne, 29, has been charged with owning a dog dangerously out of control resulting in the death of Dexter Neal at her home in Halstead.
Dashcam footage captured the tree crashing down onto 40-year-old Sarah Robb's BMW just after she left her home in Syston on Thursday.
The teenagers, aged 19 to 15, appeared in custody at Westminster Magistrates' Court on Saturday, supported by their families.