Revised street layouts and public realm improvements to Castle Hill, Castle Street, Church Street, Court Street, Weafer Street, Spout Lane, Cathedral Street, Main Street, Barrack Street, and Island Road to incorporate revised on-street parking zones, increased pavement widths, hard & soft landscaping, and improved active travel measures. Castle Hill & Castle Street to become one-way in a west-bound direction. Barrack Street to become one way in an east-bound direction as far as entrance to existing underground car park. New signal-controlled junction at intersection of Barrack Street and Island Road to assist traffic flow. Part-pedestrianisation of Market Square on northern side, with removal of on-street parking and through traffic between intersection of Main Street & Irish Street, and Main Street and Castle Street. New and enhanced raised table pedestrian crossings at south-east and south-west corners of Market Square, junction of Castle Hill, Castle Street and Church Street, and on Cathedral Street. Undergrounding of existing overhead services and removal of existing poles. High quality surface materials. Other miscellaneous works.