Home Secretary Priti Patel and London Mayor Sadiq Khan joined the Met Commissioner Dame Cressida Dick to congratulate all the finalists and the winners.
Officers believe the children are with their father Zion Jackman and their grandmother Una Dolan.
Police are working to confirm the man's identity and inform his next of kin.
This comes after they took part in a protest on Cockspur Street, St. James’ on 13 August 2019.
Detectives investigating a fatal collision that claimed the life of a 12-year-old boy are appealing for witnesses.
The operation has involved more than 30 Safer Neighbourhoods officers, as well as colleagues from the Roads and Transport Policing Command, Special Constabulary, and partner agencies
Counter Terrorism Policing can confirm that charges have been authorised against a third person in relation to the ongoing investigation into the Salisbury Novichok attack
Detectives appeal to people whose allegiance may have changed to get in contact about the murder of 'Adam'.
The court heard Harrison was aged between 14 and 17-years-old when he committed the multiple offences.
Officers investigating the death of 28-year-old Sabina Nessa are appealing for witnesses and anyone with information to come forward.
