In October, Ms Pattison tweeted she was "thrilled" that Epsom had won the Independent School of the Year 2022 award.
A parent whose daughter attends Croydon High School said the news was "an utter shock and tragedy".
She told BBC News: "In her time as head teacher, she turned the school around, and she did so many things that enriched the children's lives. เซ็กซี่บาคาร่า