Specification of John Birkinshaw's Patent], for an Improvement in the Construction of Malleable Iron Rails, to be used in Rail roads; with Remarks on the comparative Merits of Cast Metal and Malleable Iron Rail-ways. Michael Longridge, Newcastle: E. Walker, 1821. Remark: the 1838 edition (online here) does not contain the quoted sentences.
Shore, A. G. L. (April 1987). "British Rail Diesel Multiple Unit Replacement Programme". Proceedings of the Institution of Mechanical Engineers, Part D: Transport Engineering. 201 (2): 115–122. doi:10.1243/PIME_PROC_1987_201_165_02. S2CID109194039.
Butcher, Louise (24 March 2010). "Railways: Railtrack, 1994–2002"(PDF). parliament.uk. Archived(PDF) from the original on 19 December 2022. Retrieved 5 December 2022.
HM Government (1921). "Railways Act 1921". HMSO. Retrieved 25 November 2006 – via The Railways Archive.
Her Majesty's Government (1947). "Transport Act 1947". Her Majesty's Stationery Office. Archived from the original on 25 March 2012. Retrieved 25 November 2006 – via The Railways Archive.
The Rt Hon Lord Cullen (PC) (2001). "The Ladbroke Grove Rail Inquiry: Part 1 Report". The Railways Archive. (Originally published by Her Majesty's Stationery Office). Retrieved 30 November 2006.
The Rt Hon Lord Cullen (PC) (2001). "The Ladbroke Grove Rail Inquiry: Part 2 Report". The Railways Archive. (Originally published by Her Majesty's Stationery Office). Retrieved 30 November 2006.
Railway Safety; Standards Board (2004). "Hatfield Report and Recommendations". The Railways Archive. (Originally published by Her Majesty's Stationery Office). Retrieved 30 November 2006.
Shore, A. G. L. (April 1987). "British Rail Diesel Multiple Unit Replacement Programme". Proceedings of the Institution of Mechanical Engineers, Part D: Transport Engineering. 201 (2): 115–122. doi:10.1243/PIME_PROC_1987_201_165_02. S2CID109194039.
Her Majesty's Government (1947). "Transport Act 1947". Her Majesty's Stationery Office. Archived from the original on 25 March 2012. Retrieved 25 November 2006 – via The Railways Archive.
Butcher, Louise (24 March 2010). "Railways: Railtrack, 1994–2002"(PDF). parliament.uk. Archived(PDF) from the original on 19 December 2022. Retrieved 5 December 2022.