After hitting people on the bridge, the three attackers jumped out, ran into the Borough Market area while "stabbing numerous people, including a British Transport Police officer and an off-duty Met police officer", police said Saturday.
"The effects could have been even worse", Commander Dean Haydon, head of MPS Counter Terrorism Command said Friday, as cited by the Guardian. "How did they know each other?"
"One unconfirmed report suggests that did happen, apparently when Zaghba arrived at Stansted Airport in January - but that border staff still let him in", he said.
A police officer who was stabbed in the eye trying to stop the London Bridge attackers with only his baton has said he was sorry he couldn't do more.
It was not clear why he could not pay, or if he lacked the necessary license to drive such a vehicle.
The potential for large vehicles to inflict mass casualties was laid bare in horrifying fashion a year ago when a lorry drove through crowds gathered to celebrate Bastille Day in Nice, killing 86 people and injuring scores more.
"My view at the moment is that he then went to plan B and ended up hiring the van instead", Haydon said. Rumaysah rented out bouncy castles in east London, before traveling to Syria in autumn 2014 after skipping bail.
The British Red Cross is working with organisations across London calling on people to "take a ride for London, eat a dish for London and say cheers for London", and numerous restaurants and outlets in the Borough Market area will be supporting the fundraising.
As more victims of Saturday's attack were named, a minute's silence was held across Britain on Tuesday morning as a mark of respect for those killed or injured.
The knives are 12 inches long and are branded Ernesto.
Among the evidence were plastic water bottles, like those used to create the fake suicide belts each of the terrorists was wearing during the attack.
A French national was also killed in the attack, according to foreign minister Jean-Yves Le Drian, which the BBC understands to be Alexandre Pigeard, 27.
It was also been revealed on Tuesday that their white van contained several bottles of a flammable liquid wrapped with rags, together with two blow torches.
"They were still fairly close to the van".
It appears that British security services are themselves concerned that they could be losing track of potential threats - sources said that after the Manchester bombing, security agencies began re-evaluating the risk level of individuals categorized as former subjects of interest.
But Labour leader Jeremy Corbyn said the right response was to "halt the Conservative cuts and invest in our police and security services and protect our democratic values, including the Human Rights Act".
The family of an off-duty police officer, Charlie Guenigault, who has been hailed as a hero for running toward the attackers, praised his bravery and said he would likely do the same again if faced with the same situation. Where might the attackers have bought them? Ismail Abedi, 23, was arrested in Chorlton on May 23, a day after the terror attack on Manchester Arena which killed 22 people, including seven children.
There are already questions about why one of the attackers, Khuram Shazad Butt, who was known to police was able to carry out the attack. When Bakri Mohammed was banned from the United Kingdom after the 2005 London bombings, Anjem Choudary, a British-Pakistani extremist with legal training, emerged as the group's leader in the UK. He was jailed past year for encouraging support of IS, which has been linked to numerous militant plots in Britain and overseas.
Butt was still one of 3,000 "subjects of interest" considered the most risky potential threats in the country and was a figure in one of just 500 active counter-terrorism investigations, the sources said.