Tenaged girl gone missing

It appears a girl named ruby Mallon has gone missing. the last place she has been seen was at her house. Her mother says that “she just got up and left out the back door,I thought she was just going out on to the trampoline but when I checked on her she was gone.” She goes by the name Ruby Emma Mallon born 13th March 2010. She has dark brown hair , blue eyes. She was wear grey shorts and a white top.