He then went on a stabbing spree along with Rachid Redouane, 30, of Moroccan and Libyan descent and Moroccan-Italian Youssef Zaghba, 22, in Borough Market.
"The majority of them have a domestic focus, if I can put it that way, a domestic centre of gravity", she said.
Funds will go to the charity's UK Solidarity Fund, which was launched in response to the Manchester Arena and London Bridge attacks. It was not clear why he could not pay, or if he lacked the necessary licence to drive such a vehicle.
The potential for large vehicles to inflict mass casualties was laid bare in horrifying fashion previous year when a lorry drove through crowds gathered to celebrate Bastille Day in Nice, killing 86 people and injuring scores more. Shortly before 1700 GMT, Butt received a text message confirming his hire of a Renault van instead.
As well as bags of gravel in the back of the van, there were 13 wine bottles full of lighter fluid and primed with rags as fuses.
They include donating to the trader support fund, visiting other markets across the capital where some traders also have stalls, buying goods from their websites and supporting the Red Cross Saturday Night for London campaign.
Officers are particularly keen to hear from anyone who witnessed the white van targeting individuals on London Bridge, saw the suspects attacking members of the public or armed police engaging the suspects.
Bound with black tape, the 12-inch weapons which helped kill and maim revellers last Saturday were ceramic, possibly so the murderers could avoid metal detectors, police believe.
Police have discovered equipment for making petrol bombs, plastic bottles and duct tape for constructing fake suicide bomb belts, and an ID card for Redouane.
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Forensic evidence at the house suggested that the three attackers, who were shot and killed near Borough Market by police, acted alone.
Two Australian families are mourning the death of young women.
All three attackers were shot dead before they could make their way back to the van, which held a stash of Molotov cocktails.
Investigators also found gravel bags, which also could have been part of their cover story, or may have been "used to weigh the vehicle down", making it heavier and giving it more force. "They were still fairly close to the van".
At 2.05am, police also arrested another man, 28, at a residential address in Barking, also on suspicion of preparing terrorists acts.
Inside, they found a copy of the Quran opened at a page describing martyrdom.
"Many witnesses we've spoken to have provided extremely helpful accounts of the attack", Haydon added, "but we are still missing pieces of the picture". Haydon acknowledged that Butt had links to al Muhajiroun, a banned group headed by cleric Anjem Choudary.
Butt was also arrested for fraud last October but was about to be told by prosecutors he would face no further action.
Material tethered to one hilt is shown saturated with blood and was apparently designed so killer Khuram Butt could strap it to his wrist, commander Dean Haydon said. The police also said that six other suspects remain in custody.
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