Oldfield said Williams had previous convictions for drug driving and drink driving and police had described him as “drunk and shaken” when he was arrested.
He had also tested positive for cocaine use.
Williams said he had drunk to two three pints of beer prior to the incident.
The prosecutor added that Williams had told police that “two unknown men” had been aggressive towards him and Wilson and had thrown punches.
He said his actions were “designed to defend himself”.
William England, for Williams, said the jockey had not realised how severe Wingrove’s injuries were.
He said Williams had never been involved in violence before.
Det Con Hannah Barrett, speaking outside court after the hearing, said Richard Wingrove had been “celebrating his birthday” when he lost his life in a “completely avoidable act of violence”.
She said his death had caused “devastation for so many people”.
