Detectives in Greenwich have arrested a 53-year-old woman in Deptford in connection with an incident in Eltham High Street on Thursday 13th September where a baby was given an unknown substance.
She remains in custody at a south London police station.
More top news
Scotland Yard confirm that two people arrested in connection with the attack on Westminster have been released with no further action
An appeal to support the family of murdered policeman Keith Palmer has reached more than £700,000 in two days.
PC Keith Palmer will be remembered permanently at the National Memorial Arboretum, Home Secretary Amber Rudd has said.