Australians in London have marked the centenary of soldiers returning from the First World War, focusing on the suffering of those who came home.
About 2000 Australians, New Zealanders and British attended the Anzac Day Dawn Service at the Australian and New Zealand war memorials at Hyde Park Corner on Thursday.
Australian High Commissioner George Brandis told the crowd 2019 marked the centenary of most servicemen coming home from World War I.
"The cost in lives sacrificed on the battlefield, massive though it was, was not the only human cost, for most of those who returned home would never be the same again," Mr Brandis said.
"So many who survived the fighting returned to their families with injuries which would haunt their days and shorten their lives.
Mr Brandis said for Australia and New Zealand "the 1920s were a blighted decade".
"The physical injuries were manifest and in most cases they would heal. What was not visible or even understood was the mental suffering of so many of those who returned," he said.
Later in the day, Prince Harry - awaiting the birth of his first child - is set to join Kate, the Duchess of Cambridge, and the Queen's cousin, the Duke of Gloucester, at an Anzac Day afternoon service at Westminster Abbey.
Brisbane local Melanie Roylance, 54, attended the London dawn service to remember family members who fought and died, including her own father, who died of complications years after his World War II service.
Ms Roylance said focusing on not just the individuals who died but also the broken ones who returned put a human face on Anzac Day.
"We've got relatives who came back with severe gunshot wounds and who were disfigured. One fellow was hit by machine gun fire across his face so he was badly disfigured, so he was shunned by people," she told AAP.
"People would see him in the street and look away. Even though they knew what had happened to him and why, he was still shunned by the society that he had gone off to support."
Sydneysiders Sue and Keith Creighton, aged 60 and 63, are on holiday in the UK and attend a dawn service every year as part of Mr Creighton's birthday, which falls on April 25.
Mr Creighton said returned soldiers' suffering had been overlooked in the past.
"It was bit forgotten back then, it wasn't considered. But now that it is, that's a good thing," he told AAP.
Ms Creighton added: "We've all got connections with those people with shattered lives and the families that tried to carry them through and struggled with it."
