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.
British police are asking Irish people who may have information about the terrorist attack at London Bridge last week to come forward.
Metropolitan Police arrested four men in two days for carrying machetes near train stations in London earlier this week.
All proceeds will go to the British Red Cross UK Solidarity Fund, which was launched in response to the attacks in London and Manchester.
The New Arab has seen a video showing the man's arrest, after police chased him down the road.
"Ever since the appalling attacks in Mumbai there have been other similar, what we would call, marauding terrorist attacks, we have tried to build up our capability, skill and understanding of how to tackle them".
However the three men failed to provide payment details and the vehicle was not picked up, prompting them to use a smaller van instead, the BBC reported. Local police revealed that the three had loaded the van with sacks of gravel, in all likelihood to increase the van's weight so that they could use it as a "battering ram" against the pedestrians.
Two Australian families are mourning the death of young women.
Police said the men tied 30cm pink ceramic knives to their wrists and had petrol bombs in the van.
Butt drove the van into pedestrians on London Bridge last month and later went on a stabbing rampage with Rachid Redouane, 30, of Moroccan and Libyan descent and Moroccan-Italian Youssef Zaghba, 22, in Borough Market.
An undated handout photo issued by the Metropolitan Police, London, and made available Saturday, June 10, 2017, of the inside of the van used in the London Bridge attacks of Saturday June 3 which killed several peop.
"Getting hold of a 7.5 tonne lorry - the effects could have been even worse", Haydon told reporters. There were also two blowtorches.
Police also found a number of office chairs, gravel and a suitcase in the van.
The three attackers were wearing fake suicide belts consisting of plastic water bottles wrapped in gray duct tape.
"Was there a plan B that, after they had stabbed individuals, were they then planning to come back to the van and ignite the Molotov cocktails and that was a secondary attack?"
Police raided Redouane's small residence on Tuesday and said he had been renting it since April. Following the terror attack, 12 were arrested and released within 24 hours without any charges pressed against them. All but five have been released.
Police released an image late Saturday night of one of "the distinctive pink knives used during the London Bridge terrorist attack".
The question remains how the men met and knew one another but police said Saturday they did not suspect a wider plot. "Where might the attackers have bought them from?" he said in a statement.
A 28-year-old was arrested at a residential address in Barking, while a 27-year-old man has been arrested following a search of a property in Ilford.
Authorities also said that though the Islamic State has claimed responsibility for the attack, the evidence so far suggests that the men acted on their own - but investigators are still piecing together exactly how the men knew each other.