Jhangur, 24, had previously also pleaded guilty to a charge of causing serious injury by dangerous driving.
Those charges related to three people who were near Mr Marriott, including off-duty midwife and councillor Alison Norris, as well as his Jhangur’s mother Ambreen and his sister Nafeesa.
Earlier, judge Mrs Justice Lambert KC asked the jury of six men and six women if any further time would mean they would reach verdicts.
The foreman indicated they would not.
The judge formally discharged them and thanked them for their deliberations
“I know how hard you have striven to reach verdicts. You leave with my heartfelt thanks,” she said.
Jhangur was remanded in custody ahead of a further hearing on 12 August where a potential retrial would be discussed.
