South Australian nurse confirmed as London attack victim

In a statement released on Tuesday night, her family said the 28-year-old was running to help victims of the stabbing and van attack when she was fatally injured.

Releasing a photo of their smiling daughter holding sunflowers, Kirsty's family said she was "loved and adored by her family, friends and boyfriend".

"She was the most outgoing, kind and generous person who loved to help people," they said.

"Helping people was what she loved to do in her job as a nurse and in her daily life.

"As she ran towards danger, in an effort to help people on the bridge, Kirsty sadly lost her life.

"We are so proud of Kirsty's brave actions which demonstrate how selfless, caring and heroic she was, not only on that night, but throughout all of her life. Kirsty – we love you and we will miss you dearly."

The family asked for privacy to grieve Kirsty away from the public eye and said they will not be making any further comment on the "tragedy".

A keen traveller, she ran a blog in which Kirsty identified herself as a 28-year-old Australian living in London and working full-time in the healthcare sector.

She described herself as "just your average dreamer, with a full-time job and a constant longing to go where I haven't been".

Recent posts detailed her travels in Milan, Sofia and Lisbon, and a trip to Kyiv, Ukraine for the 2017 Eurovision song contest.

"I recognise that I might not go everywhere but I should definitely go everywhere I can, and so should you!" Ms Boden wrote.

"At risk of sounding cliche, life is short and we should all use the time we have wisely."

Mystery still surrounds the circumstances of another Australian, Brisbane au pair Sara Zelenak, also feared to have been caught up in Saturday night's terrorist attack, which killed seven people.

Her mother Julie Wallace was travelling to London on Tuesday to find her daughter, who was last seen by her friend Pri Gonçalves when fleeing the scene of the attack.

"I have to go and do something, I have to go over there," Ms Wallace told a Brisbane radio station. "My husband and my boys are insanely distraught. I have to stay strong for them because that's what I have to do."

Ms Gonçalves earlier told Fairfax Media she was separated from Ms Zelenak as they desperately ran away from London Bridge. 

"I ran thinking she would be running with me but I looked back and she wasn't there," she said. "I thought I was going to die, it was by far the most traumatising, shocking and scariest moment of my life."

On Tuesday morning, Prime Minister Malcolm Turnbull said Australia maintained "real concerns" about two missing Australians, including Ms Zelenak.

"We are working diligently in London with the police and other authorities there and of course, staying in very close contact with their families as we seek to confirm the circumstances relating to those two Australians," he said.

London Metropolitan Police said it was working with the coroner to identify the deceased victims and had dispatched family liaison officers to work with their families.

A Met spokeswoman told Fairfax Media on Tuesday afternoon: "There is a process that we need to go through and given the circumstances we need to go through that process. We won't be commenting any further than that."

smh.com.au