A memorial service will be held to commemorate the 100th anniversary of Britian's worst rail disaster.
More than 200 soldiers were killed after a train derailed and caught fire at Quintinshill, near Gretna Green, south-west Scotland on 22 May 1915.
The Princess Royal and First Minister Nicola Sturgeon will be attending the special service today (22 May), at the Rosebank Cemetery in Edinburgh where a memorial carries the name of everyone who died.
The soldiers from the Royal Scots were travelling in a train on their way to Gallipoli, when it crashed into a train which was stationary at the mainline near the Scottish and English border.
Other fatal rail crashes in the UK
Harrow and Wealdstone, 112 killed, 8 October 1952
Potters Bar, 7 killed, 10 May 2002
Ladbroke Grove Park - 31 killed - 5 October 1999
Clapham Rail Junction - 35 killed - 12 December 1988
Winsford - 24 killed - 17 April 1948
Shortly after, a Glasgow-bound express train then smashed into the wreckage at the Quintinshill signal box causing a devastating fire which engulfed the troops' train.
The two signalmen controlling the line were both sent to prison.
Twelve civilians were also killed and a further 246 people were injured – however, the death toll remains unclear to this day.
Other commemorative events include a march to Quintinshill, the unveiling of a roll of honour at Gretna Old Parish Church and a tree planting at Gretna Green war memorial.