Strictly speaking they are not. Most of the aircraft belong to individual private owners and are based at different airfields and private strips, mainly in Wiltshire and Hampshire. They then rendezvous at airfields when booked for displays.
Other WW1 replicas including our BE-2c and Paul Ford’s Fokker DR-1, are based at Sywell, while the Real Aeroplane Company’s DR-1 is of course, based at Breighton.