Merseyside Police swiftly declared that the incident was not terrorism. But the circumstances behind the alleged attack remain unclear.
The force previously said 134 people — including infants, other children and adults — were injured when Doyle, reportedly a former Royal Marine, allegedly drove his Ford Galaxy Titanium into crowds in Liverpool city centre.
There were no fatalities, but 50 required hospital treatment.
According to initial police information, Doyle allegedly followed an ambulance down the closed Water Street in his Ford Galaxy when police cleared a path for a medical emergency.
Four people, including one child, were trapped under the vehicle, which had to be lifted to remove them, fire services said at the time.
The criminal charges relate to 29 victims, including at least six children. The youngest was six months old at the time.
Some of those set to give evidence will reportedly do so from behind screens.
A father-of-three, Doyle has been in custody since his arrest following the incident that turned a day of joy into a scene of chaos.
He was originally charged with seven offences, but 24 new counts were added to the indictment in August.
On Sep 4, he appeared in court via videolink from prison, wearing glasses and a grey T-shirt, when he entered his not guilty pleas.
Doyle was not required to attend his latest court hearing last week, which finalised preparations for the trial.
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