When the radar defence of Great Britain was set up, Robert Watson-Watt and his team created a chain of radar stations around the coastline.
The Room | Room 222 | A Room for Romeo Brass | The Viper Room | The Room (film) | One-room school | The War Room | Purcell Room | Panic Room | Room 401 | Electronic filter | The Room (play) | The Mystery of the Yellow Room | The Changing Room | The Blasting Room | Room in the House | Digital filter | Cherry Filter | Chat room | Bart Got a Room | Air filter | White Room | Walking the Room | The War Room with Quinn and Rose | The War Room with Michael Shure | The Shuttered Room | The Room (video game) | The Living Room | The Chinese Room | Silent Hill 4: The Room |
The 13 Group HQ was at Kenton, near Newcastle upon Tyne with the Filter Room at nearby Blakelaw Quarry (not Blakelow, as erroneously mentioned previously).