1 2 Harris, Nigel, ed. (1–14 May 2013). "Main construction work gets underway on £294m Borders Railway". RAIL. No.721. p.21.
1 2 Piggott, Nick, ed. (May 2014). "'Waverley Route' to run to Carlisle? Scotland's First Minister hints at Borders Line extension". The Railway Magazine. p.6.
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