Some ten years have passed since four suicide bombers struck the heart of central London during the morning rush hour on July 7th, 2005.
A total of 52 people were killed and hundreds more injured.
From that day on, Britain's security landscape changed.
On June 30th of this year, London played host to its largest ever security exercise which saw armed police responding to 'maurauding' gunmen.
This exercise came just days after 30 British nationals were gunned down at a Tunisian beach resort.
Britain's security threat level currently stands at severe, suggesting authorities believe an attack is highly likely.
This has put UK emergency services into high-scale preparations.
Maxine de Brunner is London's Metropolitan Police Deputy Assistant Commissioner.
She says the UK capital needs to be ready to handle an attack.
"We have looked at events across and around the world since 7/7 and have said to ourselves, 'Would we be ready if there was that style of attack, whether it be France or Tunisia or wherever it may be, would we be ready for that style of attack here in London?"
Over the past decade, the threat from terrorists has changed somewhat.
The attacks during 7/7 were directed at a distance from Afghanistan and Pakistan by al-Qaeda.
But today, Britain is facing the threat of home-grown terrorism, particularly from those who have sympathies toward the Islamic State.
Doctor Hugo Rosemont is the Assistant Director of the Centre for Defense Studies at the Department for War Studies at King's College London.
He says authorities need to be reaching out to young members of the UK's growing minority populations if they want to help prevent attacks.
"I think one of the things that UK government and other governments also need to do is reach out outside of government more, working with communities and others, funding that as appropriate to make sure that these ideas don't take root among particularly younger members of society who may feel that they have a motivation or a cause to do this."
For the family of Miriam Hyman, educating young people and preventing further attacks has become their main goal.
Miriam was killed during the attacks on London when a suicide bomber detonated an explosive on board a bus in Tavistock square.
Her mother and sister are trying to introduce lesson plans about the July 7th bombings into schools, as many of the younger children may never have heard of the attacks.
Miriam's mother Mavis says with the current threat from the Islamic State, it's important to get into schools as early as possible to educate students.
"They really are pumping messages of hatred, they are pumping messages of negativity, and what we are doing by getting in as early as possible to countermand this,"
On Tuesday, the tenth anniversary, a memorial service will be held at St Paul's Cathedral, followed by a minute's silence across the whole of London's transport network.
For CRI, I'm Sophie Williams.
