North Pole Depot, London & Continental Railways, retrieved 1 November 2013
legislation.gov.uk
"Channel Tunnel Act 1987", www.legislation.gov.uk, Schedule 2. SUPPLEMENTARY PROVISIONS AS TO THE SCHEDULED WORKS AND OTHER AUTHORISED WORKS, Part I APPLICATION OF ENACTMENTS, Further works and powers, 12.2
railengineer.uk
Wordsworth, Nigel (24 December 2015), "T2 at North Pole", www.railengineer.uk