Cambridgeshire is a county in England, bordering Lincolnshire to the north, Norfolk to the northeast, Suffolk to the east, Essex and Hertfordshire to the south, and Bedfordshire and Northamptonshire to the west. The city of Cambridge is its county town. The RAF has several stations in the Huntingdon and St Ives area. RAF Waterbeach, 6 miles north of Cambridge, is a former RAF airfield, now used as an army barracks. Most of Cambridgeshire is agricultural. Silicon Fen, also known as the Cambridge Cluster, is home to a large cluster of high-tech businesses focusing on software, electronics and biotechnology. Many of these businesses have connections with Cambridge University, and the area is now one of the most important technology centres in Europe making it a fantastic location for a serviced office in Cambridgeshire. The M11 runs north from the North Circular Road (A406) in South Woodford in northeast London to the A14, northwest of Cambridge.