PC Elvis Moreira was found to have engaged in inappropriate and sexual communications with the child between 2019 and 2020.
Chief Superintendent Jill Horsfall, who leads policing for west London, said: “PC Moreira’s behaviour was repugnant and fell very far below the high standards we expect of our officers.
“The hearing carefully considered the evidence and dismissed PC Moreira without notice.”
The grooming allegations were reported to Thames Valley Police in September 2023 and an immediate investigation was launched, with PC Moreira suspended from duty.
The case did not meet the evidential threshold for criminal charges, but there was a misconduct investigation by the Met’s Directorate of Professional Standards.
The allegations were found to be proven at the level of gross misconduct and that PC Moreira had breached standards of professional behaviour in relation to discreditable conduct.
He was immediately dismissed, and PC Moreira will now be put on the barred list held by the College of Policing.
Those appearing on the list cannot be employed by police, local policing bodies, the Independent Office for Police Conduct or His Majesty’s Inspectorate of Constabulary and Fire and Rescue Services.