Alpa Patel
BBC London

Last month I spoke to Steven Desborough who was aged 27 when he was travelling in the Circle line train that was bombed outside Aldgate.

He was the last surviving civilian to leave the Tube following the attack and described how he heard a loud bang and a screech, before there was a big white flash.

Following the explosion he tried to help others on the train by trying to reassure people to stop them going into shock and held a young lady in his arms, who later passed away.

"I don't feel I did anything out of the ordinary," he said. "I did what I could, but I wish I could have done more. I did my best on the day."

Image source, Steven Desborough

Reflecting on what happened 20 years on, he said it "changed me for the better".

"It's made me more patient, more empathetic. But it hasn't defined me."

You can read more about Steven's story and how he has coped following the attack here.

The 7/7 suicide bombings took place at locations across central London's transport network.

Three of the attacks took place on the London Underground at 8:49 while the fourth was at Tavistock Square an hour later on the number 30 bus.

Harry Low
BBC London, reporting from Tavistock Square

Sir Keir Starmer joined victims' families, personnel from the emergency services and others at Tavistock Square to mark the minute's silence.

He laid a wreath to remember the 13 people who died on the number 30 bus in what would be the final bomb attack of the day.

It's a sombre mood inside the park where the victims are being remembered.

James W Kelly
BBC London

Image source, PA Media

As memorial events continue across central London, we hear more from Prime Minister Sir Keir Starmer.

"Today the whole country will unite to remember the lives lost in the 7/7 attacks, and all those whose lives were changed forever," he says.

"We honour the courage shown that day- the bravery of the emergency services, the strength of survivors, and the unity of Londoners in the face of terror.

"Those who tried to divide us failed. We stood together then, and we stand together now- against hate and for the values that define us of freedom, democracy and the rule of law."

Karl Mercer
Political editor, BBC London

Peter Rhodes qualified as a paramedic six months before he was sent in a response car to Tavistock Square following the 7 July bombings.

"It's quite strange really. It was really quiet, I remember it being really quiet. There were lots of people but there was a strange silence around, that's the thing I remember the most about it," he says.

"It was just awful... Although you can train for these sorts of things, actually arriving and seeing it first hand and just understanding that the people there are relying on you to do your best and to be able to sort of get a grip of the situation - it's quite a thing."

Harry Low
BBC London, reporting from Tavistock Square

Representatives from London's emergency services have started filing into Tavistock Square ahead of the minute's silence here.

This was the location of the fourth and final attack of 7/7 when a bomb killed 13 people on a bus at 9:47.

Gem O'Reilly
BBC London reporting from Edgware Road station

Dozens of bouquets of colourful flowers have been laid in front of the memorial plaque at the Edgware Road station.

I've seen family members of the victims in tears as they hug each other and bond over what was a tragedy here at the station 20 years ago.

TfL staff members have also been reflecting on what today means to them.

Taiwo was working at Tottenham Court Road when the bomb here went off.

She describes the panic and atmosphere she experienced that day and says today is "extremely important and emotional" for the TfL team who helped commuters out to safety 20 years ago.

Sonja Jessup
Home affairs correspondent, BBC London

Image source, PA Media

Speaking ahead of the anniversary, Met Police Commissioner Sir Mark Rowley tells me he remembers the “slow horror” of how news of the bombings unfolded that morning, while also paying tribute to those who stepped forward to help.

“The bravery, the resilience, was as inspiring as the attack was ghastly,” he says.

I understand that around 80 officers and staff who served on the frontline that day will be among those attending today’s memorial service at St Paul’s Cathedral.

The attacks brought about many changes to policing, including closer relationships with the security services.

Sir Mark acknowledges that we are “living in difficult times and sadly no system will ever be perfect” but sought to reassure Londoners that “you’ve got extraordinary people working day in and out to protect you”.

James W Kelly
BBC London

Image source, Getty Images

Gill Hicks, an Australian who was working and living in London, was the last survivor to be taken up to the surface following the bombing at Russell Square.

She lost both legs in the explosion and was initially labelled as "one unknown" when she was taken as a patient to Guys and St Thomas' Hospital.

She tells the BBC how a detective called James helped identify her. He got her to blink as he went through the alphabet, each time she recognised a letter in her name.

"People risked their lives to save my life as 'one unknown'. And they gave me everything they could and it was holding my broken body with unconditional love - that's extraordinary," she says.

"I think there's a sense that once you get past that 20 years it is the last milestone, and it is important to be together," Ms Hicks says on returning to London.

Sir Keir Starmer is among those who laid wreaths at the memorial to the victims of 7/7 in Hyde Park this morning.

The message attached to the wreath reads: "Our thoughts are with those who lost their lives and survivors of 7/7.

"Twenty years on, we remember and we grieve them."

The prime minister and London Mayor Sir Sadiq Khan laid wreaths at the 7 July memorial in Hyde Park at 8.50am, to coincide with the moment that the first bomb went off.

Karl Mercer
BBC London political editor, reporting from Hyde Park

Image source, PA Media

The prime minister has joined London’s mayor, and emergency service leaders to lay flowers at the Hyde Park Memorial to victims of the 7/7 attack.

After a minute’s silence, Sir Keir Starmer and Sir Sadiq Khan led the wreath laying - followed by the commissioners of London’s three police forces, representatives from the London Ambulance Service, the London Fire Brigade as well as members of the London assembly and the capital’s local councils.

Image source, PA Media

Nora Fakim
BBC News reporter at Aldgate station

Flowers have been left under the plaque remembering the seven people killed at Aldgate station.

Seven people died when a bomb was detonated on a Circle line train which was travelling between Liverpool Street and Aldgate 20 years ago.

Gem O'Reilly
BBC London reporter at Edgware Road station

A minute's silence has just been held to mark the time of the first bombing at 8:49 at Edgware Road station 20 years ago.

Two further explosions on Tube trains and one on a bus took the lives of 52 people and injured more than 700.

Harry Low
BBC London, reporting from Russell Square

There is a visible police presence outside Russell Square station, scene of the deadliest site of the 7/7 bombings, where half of those killed in the bombings lost their lives.

Wreaths have started arriving, adorned by handwritten messages.

"We will never forget the victims…" says one from TfL's general counsel Andrea Clarke.

“Their families and survivors and everyone impacted by that tragic day and afterwards.”

Gem O'Reilly
BBC London reporter at Edgeware Road station

I'm at Edgware Road station where commemorations will be held today to remember those who died in the 7/7 bombings, 20 years ago on this day and on this morning.

At 8:49 there will be a minute's silence held here for those who tragically lost their lives.

Transport for London (TfL) staff here are already laying flowers in front of the memorial plaque, which lists the six victims who died in the bomb attack on a Circle Line train near this station.

Those include Michael Stanley Brewster, Jonathan Downey, David Foulkes, Colin Morley, Jennifer Vanda Ann Nicholson and Laura Susan Webb.

There is a sense of reflection this morning amongst TfL staff and a huge respect for the service staff who risked their lives in this atrocious attack.

James W Kelly
BBC London

Image source, Getty Images

Sir Tony Blair, who was prime minister during the 7/7 bombings, says the UK is safer in the years since the attacks.

"We're a lot safer from terrorism because the security services have a very good system in place," he tells the BBC's Dominic Casciani.

"But there will be a problem as long as the ideology exists."

Sir Tony adds that the challenges faced by his successors have become more complex.

Sean Coughlan
Royal correspondent

Image source, Reuters

King Charles has called on people to stand united "against those who would seek to divide us", in a message marking the 20th anniversary of the 7/7 attacks in London.

In his comments he condemned the "senseless acts of evil" that saw bombs detonated on the capital's public transport system and called for a "spirit of unity", saying the attacks had shown the importance of "building a society where people of all faiths and backgrounds can live together with mutual respect and understanding".

The King added that his "special prayers remain with all those whose lives were forever changed on that terrible summer's day", including those who carried the "physical and psychological scars".

Read more of the King's comments here.

Anna O'Neill
Reporting from King's Cross station

The families of those killed in a series of bombs on the Tube network 20 years ago have begun to arrive at King's Cross station for a wreath laying ceremony to mark the anniversary.

The family of one woman could be seen finding her name among the 26 victims commemorated on a plaque at King's Cross station.

A number of memorial events will be taking place on Monday to mark the 20th anniversary of the attacks.

At around 08:50, Mayor of London Sir Sadiq Khan will be joined by members of the emergency services at the 7 July Memorial Gardens in Hyde Park.

The main memorial service will then take place in St Paul's Cathedral from 11:30 and will be attended by survivors, bereaved families, members of the emergency services and senior politicians.

People are also expected to gather at the four sites where bombs were detonated on the transport network.

We'll have reporters at the various events who will be providing details of everything going on throughout the day.

We'll also be hearing from various people who had a role in events 20 years ago.

Image source, PA Media

The investigation into the 7/7 attack became the biggest police investigation in British history.

Earlier this year the BBC released the four-part series called 7/7: The London Bombings, which investigates what happened.

You can watch the entire series on iPlayer here.

You can also see a video montage of how the day unfolded here.