Sydney officer was driving at 135km/h without siren or police lights before crash, court told

Harry Thomas Little has pleaded not guilty to dangerous driving after his patrol car smashed into a grandmother's Mercedes

A Sydney police officer was allegedly driving at 135km/h in a 70km/h zone without his siren or coloured lights on just before he crashed into a grandmother's car, leaving her with a severe brain injury, his trial has heard.

Harry Thomas Little, 42, has pleaded not guilty to dangerous driving occasioning grievous bodily harm after his highway patrol car slammed into the driver's side of Sydney woman Gai Vieira's Mercedes in September 2018.