The Great Western Main Line passes through Berkshire, Oxfordshire and southern Buckinghamshire. The South Eastern Main Line and High Speed 1 pass through Kent; the latter connects to the Channel Tunnel. The Brighton Main Line passes through Surrey and West Sussex. The North Downs Line runs from Berkshire then through Surrey to connect with Sussex and Kent. The West Coast Main Line passes through northern Buckinghamshire. The Chiltern Main Line is a major commuter line between Birmingham and London passing through central Buckinghamshire and Oxfordshire. The Port of Dover and the port at Folkestone have many ferry services to France and though none currently run to Belgium.