Tilly, this tells the story the right way around ... and explains Christine.
//Gabriel interrogates Christine Levison (Rosalind Eleazar) in hospital – Christine, who's somehow sustained burns in a fire, is a suspect in the acid murders and has no alibi for the latest killing, having signed out of the hospital at 7.50am and back in at 9am.
Aged 15, Christine had used acid on her mother's abusive lover, as revenge for his own acid attack on the mother. "I had a reason for what I did," she says, insisting she's innocent of the other crimes.//
http://www.digitalspy.com/tv/feature/a837597/rellik-episode-1-explained-timeline-forwards/