Memorial services this week will mark the 100th anniversary of Britain's worsttrain crash.
At 6.50am on May 22 1915, a train packed with First World War troops travelling from Larbert in Stirlingshire collided with a local passenger service at Quintinshill near Gretna on the Scottish-English border.
Almost at once a Glasgow-bound express train smashed into the wreckage, setting off a devastating fire which engulfed the troop train, packed with nearly 500 members of the Leith Battalion of the Royal Scots.
A total of 214 soldiers were killed, as well as 12 civilians, although some remains were never identified and it is thought that the death toll could have been higher. In addition to the deaths, there were 246 injuries.
The troops were on their way to Liverpool, where they were due to sail to the front line at Gallipoli.
Among the memorial services will be one at Larbert on the anniversary of the disaster on Thursday, when a procession involving the military, community groups and local schools will walk from the town's parish church to Larbert station for an evening service.
There will also be commemorations in Gretna and in Carlisle, where a number of people on the local train and express train lived.
After the disaster, signalman James Tinsley was sentenced to three years' penal servitude and another signalman, George Meakin, was jailed for 18 months. Both were released in December 1916.
A BBC programme, Quintinshill: Britain's DeadliestRail Disaster, being shown this week suggests that some of the worst-injured casualties were shot in acts of mercy because there was no chance of them being rescued.
Interviewed for the programme, Colonel Robert Watson of the Royal Scots said: "All those that could be rescued were rescued. Many of them had amputations carried out underneath burning carriages so that they could be rescued.
"But many, of course, were trapped in such a position that they could not be got out or else the fire had taken hold and they could not be got to."
He went on: "Since then, we have heard stories of some soldiers being shot and some possibly taking their own lives. It has never been formally documented.
"My own personal belief is that it probably did happen, in a sense of compassion, of mercy killing. It is almost impossible, sitting here, to comprehend what it was like that morning."
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