Always The Vigilant Sentry.

For many years the familiar 'golf ball' domes of RAF Boulmer were a familiar landmark on the Northumbrian coastline; geodesic sentinels housing the powerful early warning radars that scanned beyond the horizon for Russian intrusions into UK airspace - providing tactical control of the Quick Reaction Alert Typhoons based at RAF Leuchars and RAF Coningsby, which are launched to intercept unidentified aircraft.