Film crews were spotted filming in Greenwich South Street and Greenwich High Road earlier this week.
Photos captured by Riza Child depicted film crews on large cranes filming on Greenwich High Road, along with a community centre with the sign replaced for the purpose of filming.
Whilst it has not been confirmed what was being filmed at these locations, a passerby claimed to be told by film crews that it was for an upcoming series of Slow Horses.
The series, produced by Apple TV+, is due to air its fifth series later this year, with series six currently being filmed in London, according to FilmLondon.org.
Other London locations previously used for the series include Petticoat Market in East London, The Barbican, The Langham Hotel and Regent’s Park, which appeared on past seasons of the show.
The series, based on the Slough House series of novels by Mick Herron, stars Gary Oldman as Jackson Lamb, the witty M15 officer and head of Slough House.
Oldman previously confirmed in an interview with ExtraTV that filming of season six is well underway, although a release date for it is yet to be confirmed.