^ abHarris, Nigel, ed. (1–14 May 2013). "Main construction work gets underway on £294m Borders Railway". RAIL. No. 721. p. 21.
^ abPiggott, Nick, ed. (May 2014). "'Waverley Route' to run to Carlisle? Scotland's First Minister hints at Borders Line extension". The Railway Magazine. p. 6.