The grieving parents of a young Australian nanny stabbed to death in London Bridge two years ago are heartbroken and angry after another terrorist has claimed more lives in the same spot.
Queenslander Sara Zelenak, 21, was one of eight people and two Australian women killed in the London Bridge terror attack in June 2017.
Her mother and stepfather Julie and Mark Wallace believe the UK authorities haven't learned from Sara's death after convicted terrorist Usman Khan murdered Brits Jack Merritt, 25, and Saskia Jones, 23, on London Bridge last Friday.
The couple have slammed authorities for not monitoring Khan more closely.
He had been on parole for less than a year after serving time behind bars for his involvement in an Al-Qaeda inspired plot to blow up the London Stock Exchange in 2012.
Nanny Sara Zelenak (pictured) had only been in London for several months when she was stabbed to death in the 2017 London Bridge terror attack which killed eight and injured 48
Mrs Wallace is angry no changes have been made since a Coroner recommended 'massive changes' at the recent 10 week inquest into the 2017 attack which claimed Sara's life.
'What are they achieved if they don't make any change?' a frustrated Ms Wallace told Channel Seven's Sunrise on Monday.
'They let him out earlier and he does it again in the same place, We are all unsafe. We have got massive holes in our heart that can never be healed.'
She believes more innocent lives will be lost in London unless the system is overhauled.
Sara's mother and stepfather Julie and Mark Wallace were devastated to hear about another deadly terror attack on London Bridge, where Sara was killed two years ago
'Obviously, they're under-resourced, there's not enough police in London to protect them,' Ms Wallace said.
'That means everyone of us who travels, or even at home, is unsafe. We have to up it because it's so unfair.'
'It has to stop. They have to make changes.'
The couple had just returned from an international conference in Europe, where they met other terror victims and their families when they heard the news of