The Reclaim the Night movement which began in Leeds during the Yorkshire Ripper's reign of terror helped to change the way the authorities deal with violence against women.
The first march was in Leeds in November 1977 and was a response to women being urged to stay indoors after dark because a serial killer was at large.
Al Garthwaite took part in the first protest.
Julie Bindel lived in Leeds at the time and was followed by a man fitting Peter Sutcliffe's description the day before he killed student Jacqueline Hill, his last known victim. Her experience prompted her to begin a lifetime of campaigning.