Mamie Laverock’s family is planning to take legal action against the hospital where it has emerged she nearly died in a plunge from a fifth-storey balcony. The 19-year-old actress, famed for starring in the long-running US TV series ‘When Calls the Heart’, suffered a “medical emergency” earlier this month, according to a GoFundMe page aiming to raise money for her medical treatment, and her mother Nicole Rockmann has now opened up about how she feels her relatives now have a “negligence-type case” against St Paul’s Hospital in Vancouver, Canada. She added to The Los Angeles Times: “We have a c…