"UK Port Freight Statistics"(PDF). Department for Transport. pp. PORT0210, PORT0303. Archived(PDF) from the original on 24 December 2013. Retrieved 25 August 2015.
"UK Port Freight Statistics"(PDF). Department for Transport. pp. PORT0210, PORT0303. Archived(PDF) from the original on 24 December 2013. Retrieved 25 August 2015.