The engine of a Land Rover being driven by a peer's daughter was "screaming" shortly before it smashed a stationary car into a hedge in Worcestershire, a jury has heard.
Worcester Crown Court was told that the 4x4, being driven by Linda Granville, was seen on the wrong side of the road shortly before the crash in Malvern.
Granville, the daughter of the late Lord Granville of Eye, denies dangerous driving, claiming her vehicle suffered mechanical failure after it crashed through the gates of Great Malvern Priory on May 12, 2009.
The 61-year-old claimed in court on Tuesday that she drove through the gates after being assaulted moments earlier, and only hit them as they were being closed by a verger.
Giving evidence on the third day of Granville's trial, eyewitness Sarah Luckhurst said the Land Rover was being driven erratically before it crashed into a car waiting to make a turn at a junction.
Mrs Luckhurst, who was walking through Malvern at the time of the collision, told jurors: "I could hear an engine screaming ... a really high-pitched screaming coming from behind me. The car was swerving as it came along."
The witness, who was in Graham Road, said the vehicle came back into her view around five minutes later and was still being driven erratically.
Mrs Luckhurst told the trial: "The Land Rover came up and undertook and pushed a small black car into the hedge at the side of the road. It then careered on further along the road and then came to a stop."
The Land Rover's driver, Mrs Luckhurst said, retrieved some bags from the rear of the vehicle and then walked away at a fast pace.
Granville, of Bronsil Drive, Malvern, told the court on Tuesday that she was the "victim and not the culprit" of the incident and alleged that she was attacked by a church official shortly before her car struck the priory's gates.