- "The CTU training grounds of the first and most iconic CTU. This is where SAS agents learn their craft and as such it a patchwork of plywood targets, sandbags, barbed wire and other obstacles. One of the most archetypal examples of siege gameplay."
— Ubisoft Description
Hereford Base is a map featured in Tom Clancy's Rainbow Six Siege. Formerly a non-flying station of the Royal Air Force from World War II to the end of the 20th century, It was redeveloped for use as a training ground for the Special Air Service.
The map was reworked in September 2018 with the release of the Operation Grim Sky expansion. This replaced the makeshift training facility with a more traditional brick structure. The original map is still playable in Situations.
The purpose of the map rework was to address issues with the map's flow, balancing, and visual thematic. Each floor of the facility now has a larger surface area, with more destructible floors and walls. New Staircases and hatches were also added to increase movement between each floor. While the map has had a dramatic change in the structure of each room, the general layout of the First and Second Floors is very similar to the original map. The Third Floor saw a big change in it becoming mostly dead space, it consists of 2 actual rooms and a large area called Attic. All of the original rooms (Workshop, Dummy Depot, Ballistic Mats and So On) were removed, the area now houses the new Tractor Storage and Ammo Storage Rooms. The Basement however, saw a big change but alot of rooms still resemble the original ones, some examples include Workshop (formerly Briefing Room) Barrel Storage (formerly Lockers) and Brewery (formerly Armoury). A Hallway was added on the western side of the basement to connect to the new west staircase. The color palette for each floor was also changed in order for rooms to stand out more and provide players an easier way to coordinate strategies with one another.
- Attacker Spawn Points
- Control Tower
- Spitfire Courtyard
- Shooting Range
- 3F Ammo Storage & 3F Tractor Storage
- 2F Kids Bedroom & 2F Master Bedroom
- 1F Kitchen & 1F Dining Room
- B Brewery & B Fermentation Chamber
- Secure Area
- 2F Loom Room
- 2F Kids Bedroom
- 1F Piano Room
- B Barrel Storage
- 3F Tractor Storage
- 2F Master Bedroom
- 1F Kitchen
- B Fermentation Chamber
- The map appears as a playable stage in Tom Clancy's Elite Squad.