Twins often develop special bonds that look unbreakable from the outside, leading them to trust each other more than anyone else while growing and developing together throughout their lives.
For June and Jennifer Gibbons, this bond was so strong that they began isolating themselves from outsiders, eventually spiralling into a turmoil of pain and crime.
The pair became known as the "Silent Twins" for their refusal to speak to anyone except each other and their dolls.
