The television frontage of Slough House is at 126 Aldersgate Street, London, close to Barbican station. It is the exterior viewers associate with Jackson Lamb’s department: the place agents approach before entering the cramped, untidy workplace seen in the programme. The address is a real London building, while the intelligence unit that occupies it in the story is Mick Herron’s creation.
Where should I go first?
Barbican is the nearest Underground station for a quick look at the frontage. Allow approximately three minutes on foot from the street exit, following Aldersgate Street to number 126. Use the building number to find the stop rather than looking for a visitor sign. You can compare the upper windows and street frontage with the establishing shots from the opposite public pavement, provided you use a proper crossing and keep clear of traffic.
For a longer outing, Farringdon is a useful arrival point, especially on the Elizabeth line. Its entrances serve different parts of the station complex, so the route depends on the exit you use. The full Aldersgate Street guide gives the station approaches, nearby refreshments and the evidence behind the identification. It also explains why the frontage makes sense as one stop within a City walk rather than a destination requiring a whole day.
Why does the rear look different?
The office’s back entrance is filmed at a separate St John Street setting. Production location manager Ian Pollington explains the split in Film London’s account of Series 4. Joining the front, rear and interior work creates a single fictional address on screen, even though a visitor cannot walk through the Aldersgate building and emerge into the filmed rear location. The two exterior settings belong to different parts of the neighbourhood.
Read the St John Street rear guide before looking for that second stop. The verified information identifies the street setting without turning a service yard into a public attraction or supplying an unsupported gate number. That distinction is useful when planning: a public street view is available, but a television scene is not an invitation to follow an actor’s route through a doorway.
Can I visit the office?
The location visit consists of seeing the exterior from public land. There is no Slough House visitor desk, intelligence-office tour or public access established by the filming attribution. Keep entrances available for their ordinary use. For a fuller walk, the Slough House and the City route combines the front and rear settings with nearby streets and Bunhill Fields, with separate advice for station access and uneven surfaces.
Questions and answers
What is Slough House’s filming address?
The familiar front exterior is 126 Aldersgate Street in London.
Is the rear entrance behind number 126?
No. The television rear exterior uses a separate St John Street location.
Which station is closest to the frontage?
Barbican is approximately a three-minute walk from the building’s public pavement frontage.