The Glasshouse and the City
The Glasshouse is the high-rise setting at the centre of the operation in Boardroom Politics and Old Scores. It is a fictional building, so this guide offers a public City skyline walk rather than an office address to knock on. Its Composite label separates the recognisable financial-district setting from a claim that one real tower contains every room and rooftop shown on screen.
The later part of Series 2 depends on vertical space: a meeting behind closed doors, a building-wide emergency and a route upwards. Walking between Bishopsgate and Leadenhall Street lets you appreciate that scale at pavement level. Tall glass façades, narrow older streets and heavy pedestrian traffic sit together here. The contrast with Slough House's small, shabby frontage is easy to grasp without gaining access to a skyscraper.
A public-street route
Begin outside Liverpool Street station and walk south along Bishopsgate. Stay on the pavement, pass the junction with Camomile Street and continue towards Leadenhall Street. Allow around ten minutes from the station exit to this junction, including pedestrian crossings. This is the walking time used in the quick facts; it describes the public route, not a journey into a fictional office.
Turn left along Leadenhall Street for a view of the Leadenhall Building at 122 Leadenhall Street. Look across the street from an open section of pavement rather than standing in an office entrance. This is an architectural stop within the walk, not a verified identification of a particular Glasshouse shot. Its sloping outline helps explain why the City's towers can create such a forceful backdrop for an intelligence thriller.
Return towards Bishopsgate and cross carefully into the Leadenhall Market area via Gracechurch Street. The market's covered passages make a useful change of scale after the exposed pavements and towers. You can finish here or continue towards Bank. Take crossings in stages and leave room for people moving between workplaces; even a short walk has several busy road junctions.
Scenes worth revisiting
The two linked episode pages contain the narrative detail behind the Glasshouse operation. Save their spoiler sections until after watching: the building is a place where an apparently prestigious assignment becomes dangerous, and knowing the outcome changes the meeting's atmosphere. For a location visit, pay attention to how establishing views create an impression of height before the action returns indoors.
Access and accessibility
The route uses public pavements and crossings. Office reception areas, service entrances and rooftops are outside it. There is no Glasshouse visitor tour to book through this guide. An observation deck elsewhere in the City is a separate attraction with its own admission arrangements, not permission to enter the screen building. Access arrangements were checked on 12 October 2026.
For a step-free arrival, use the Elizabeth line at Liverpool Street and follow the signed lift route to street level. TfL publishes the relevant station and step-free information. Surface pavements avoid the need to enter another Underground station, though kerbs, crossing islands and temporary works require attention. Allow additional time if you use a mobility aid, particularly when office workers are moving in large groups.
A pub stop and timing
The Lamb Tavern at 10–12 Leadenhall Market gives the walk a practical finish. Its official website lists opening hours of 11am–11pm Monday to Saturday and 11am–7pm Sunday, checked on 12 October 2026. It is a refreshment option within the market, with its own business hours and seating arrangements. Pick a table before spreading out maps or comparing episode images.
Mid-morning offers a sensible balance between daylight and activity. Weekday lunch brings much heavier footfall around the market and office streets; weekends can make the architecture easier to photograph but change the available shopping and dining choices. On a wet day, use the covered market as the break in your route rather than sheltering in a working building's doorway.
Continue towards another location
Petticoat Lane is the nearest strong filming connection in this collection. From the Bishopsgate side of the route, walk towards Middlesex Street and Wentworth Street, allowing roughly fifteen minutes from Leadenhall Street. That takes you from monumental office buildings to the market streets used in later series. Choose the walking-route guide for a longer outing with planned stops.
Questions and answers
Can I visit the Glasshouse from Slow Horses?
You can explore the City streets and skyline that suit its setting. This guide does not identify a single publicly accessible building containing the fictional Glasshouse.
Which episodes feature the Glasshouse operation?
Series 2 episodes 5 and 6 carry its meeting, escape and rooftop action.
Where does this skyline walk start?
Start at Liverpool Street station and follow Bishopsgate south to Leadenhall Street, about ten minutes on foot.