Eight people were killed and 48 more were hurt when Khuram Butt, 27, Rachid Redouane, 30, and Youssef Zaghba, 22, launched their ISIS-inspired van and knife terror attack on June 3, 2017.
The three men had mowed down pedestrians on London Bridge before rampaging through Borough Market.
During the inquest at the Old Bailey today, CCTV was shown of the attackers making their final preparations.
They are seen in Lidl supermarket buying wine to make makeshift petrol bombs and knives.
Footage is then shown of the white van’s journey to London Bridge, moments before the carnage.
DCI Wayne Jolley told the court that all three attackers were working together by at least January 14, 2017.
They regularly trained at the Ummah Fitness Centre in Ilford and went on Sunday swimming trips to Stratford.
On May 14, Redouane was pictured at Butt’s barbeque celebrating the birth of his daughter.
The 12in pink Ernesto ceramic knives used in the attack were bought by Redouane at East Ham’s Lidl at 10.15pm the next day.
On May 30, Redouane went back to the same Lidl to buy wine bottles for the makeshift petrol bombs.
Shortly before midday on June 3, Butt, who was employed by Transport for London, was captured on CCTV withdrawing cash to hire the van, accompanied by his oldest child.
The young boy was shown tugging at Butt’s shirt before his father gathered him into his arms at the cashpoint.
Later, Butt made an online booking to hire a van from Hertz.
At around 4.30pm all the attackers were outside Butt’s block, with Redouane accompanied by his child.
CCTV footage showed them travelling together in Redouane’s red Corsa to pick up the hire van and 29 bags of gravel to add weight from a B&Q store in Harold Hill, Romford.
Redouane dropped off his child before joining the others at Zaghba’s home at Fairfield Road in Ilford.
The attackers stopped off in the van at a Shell garage at 7.54pm, where they bought diesel, drinks and snack bars before heading to Butt’s Barking address.
While there, the attackers loaded up black plastic chairs before setting off at 8.55pm towards central London.
They mounted the kerb and launched their attack on the bridge just before 10.07pm.
Within 10 minutes, the terrorists had been shot dead by police marksmen.