Wednesday, September 9, 2015, was also the day the Queen became the longest-serving monarch in British history, overtaking her great-great-grandmother Queen Victoria’s record by a day with a reign, at that point, of 63 years and 217 days.
The Tweedbank-Edinburgh railway’s official opening came three days after passenger services commenced on Sunday, September 6, and five days after a press preview trip on Friday, September 4.
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9. The Borders Railway's opening five years ago
Pipers at Tweedbank for 2015's Borders Railway opening ceremony. (Photo by Chris Jackson/Getty Images) Photo: Chris Jackson Collection

10. The Borders Railway opening in 2015
Four-month-old Harry Pettie waves his Union Jack as he waits for Queen Elizabeth II and Prince Philip, Duke of Edinburgh to arrive at Tweedbank Station on September 9, 2015. (Photo by Chris Jackson/Getty Images) Photo: Chris Jackson Collection

11. The Borders Railway opening in 2015
Nicola Sturgeon addressing the crowd at Tweedbank. (Photo: Leon Neal/AFP via Getty Images) Photo: AFP

12. The Queen at Tweedbank in 2015
The Queen at Tweedbank. (Photo: Leon Neal/AFP via Getty Images) Photo: AFP

