The relative of one of 13 victims who died in the 1924 Slade Green munitions disaster in south-east London is hoping to find other affected family members to mark 100 years since the tragedy.
Twelve young woman and one man were killed when a fire ripped through a munitions factory in Slade Green, near Erith, on February 18, 1924, shocking the nation.
The group had been breaking down Verey lights - cartridge flares used for signalling and lighting at night - when there was an explosion and the hut erupted in flames.
While some people managed to escape, 10 of the female workers, who lived locally and were aged between 16 and 24, were trapped, the BBC reports.
The factory foreman, Edward Jones, 29, also died as he tried to lift a girl from the window to help her escape.
Since 1996, annual services had been held to mark the tragedy but stopped during the Covid-19 pandemic, and relatives' names have since been lost, the nephew of one victim, Mike Smith, told the BBC.
His aunt Amelia Smith, 19, from Erith, died in the disaster.
A service to mark the centenary is planned for February 18 next year, he said.
Mr Smith is eager to find other relatives to be able to pay tribute at the service together.
"I think the girls should be recognised for the sacrifice they made," he told BBC London.
"If they had died in the trenches it would have been a big deal. Because they died dismantling explosives, it doesn't seem to be so heroic but I don't see it like that."
A joint funeral in 1924 attracted tens of thousands of people with seven of the victims, including Mr Smith's aunt, being buried in one plot in Erith Cemetery.
Mr Smith told the BBC it made him "feel a bit sick" to think about his aunt's death.
He was first told about it by his father, who at the age of 11 had been "taken out of school and told that his sister had died".
According to local parish records, it took firefighters nearly half an hour to arrive at the scene following the first call, due to its remoteness. It was then another 25 minutes before an ambulance arrived.
No definite cause for the explosion was ever established but the disaster was debated in Parliament, the BBC reports.
Following an inquest, it was recommended that "all work of an explosive nature carried out by private firms should be under the Explosives Act", in order to provide more protection for workers.
A memorial service is due to be held at St Augustine's Church in Slade Green next February.
