Billown Circuit Billown Circuit The Billown Circuit is a motorcycle road-race course used for the Southern 100, the Pre-TT Classic races and the National Road Races meetings near Castletown on the Isle of Man. Racing is held on public roads closed for racing by an Act of Tynwald, the parliament of the Isle of Man. The course is 4.25 miles (6.8 km) long and is in the parishes of Arbory and Malew. The course start-line is on the outskirts of Castletown and the course includes parts of the primary A5 New Castletown Road, A28 Castletown to Ballabeg Road, A7 Ballasalla to Port
Isle of Man Constabulary (NPTs). Northern NPT covers the North of the island: Ramsey, Andreas, Bride, Ballaugh, Lezayre, Maughold, Jurby. Western NPT covers Patrick, German, Michael, and Peel. Southern NPT covers the airport, Ballasalla, Castletown, Port St Mary, and Port Erin. Eastern NPT covers Braddan, Laxey, Lonan, and Onchan. Douglas NPT covers the borough of Douglas. Each NPT is controlled by an inspector who has established a partnership with the local community to help solve issues affecting the local area. A major event for the force is the annual TT races. The constabulary's headquarters are in Douglas. The present Chief Constable is Gary Roberts.