The 12 people arrested as part of the investigation are as follows
[A] a 27-year-old man arrested in Surrey on 12 July
[B] a 35-year-old man arrested in the Greater Manchester area on 12 July
[C] a 31-year-old man arrested in east London on 13 July
[D] a 42-year-old man arrested in Essex on 12 July
[E] a 42-year-old man arrested in Essex on 12 July
[F] a 33-year-old man arrested in southeast London on 13 July
[G] a 29-year-old man arrested in Surrey on 12 July
[H] a 27-year-old man arrested in Ipswich on 12 July
[I] a 48-year-old woman arrested in East London on 13 July
[J] a 82-year-old man arrested in Surrey on 12 July
[K] a 55-year-old man arrested in Surrey on 12 July
[L] a 60-year-old man arrested in Surrey on 12 July
Eight men [A-H] have all been arrested and detained under section 41 of the Terrorism Act, 2000 and remain in police custody at this time
Three other men [J-L] were arrested on suspicion of conspiracy to murder, and a woman [I] was arrested on suspicion of assisting an offender
Of those, one person [J] has since been released on bail, while the other three [I, K and L] remain in police custody at this time
Officers are conducting a number of searches at various addresses across the country that are linked to those arrested