A 45-year-old woman has pleaded not guilty to running down and killing a caravan park manager in Perth’s northern suburbs earlier this year.

Katie Walkerley is alleged to have unlawfully killed Rita Adderbrooke, 59, at the Kingsway caravan park in Madeley in February, after a dispute over loud music.

Ms Walkerley appeared in the Supreme Court in Perth today via video link from Bandyup Prison and officially pleaded not guilty.

She is due back in court next month.