Sophie's mother Julie spoke of their irreplaceable loss: "Sophie was, and always will be, to us a vivacious, fun-loving, extremely popular, beautiful, intelligent child.
Sophie Hook's body was found on Llandudno beach in North Wales on the morning of July 30, 1995.
Howard Hughes raped Sophie twice before strangling her and throwing her body into the sea.
Sophie, from Great Budworth, was abducted while sleeping in a tent during a kids' sleepover in her uncle's backyard in Llandudno on July 30, 1995.
Now aged 59, Hughes, who is currently incarcerated at HMP Full Sutton, is making a fresh attempt to overturn his conviction.