HOLD-UP: Giant steel props are being used to support a cut and cover tunnel at Ashford in Kent, built as part of the Channel Tunnel Rail Link. Contractor Skanska, which is building 15.2km of the high speed link through Ashford, eventually joining Folkestone to central London, will start removing the props later this month to begin construction of two dividing walls. The central tunnel will then be fitted out with two tracks which will allow trains to bypass Ashford International station at speeds of up to 300km/h. The two outer tunnels, each carrying a single track, will be used by trains stopping at the town's international station. The contract includes 1.7km of tunnels under the town and a 1.4km viaduct.