Three hours after giving birth to her longed-for baby girl, Lianne Hindle lay dead in the same hospital bed. The mother-of-four suffered a cardiac arrest at the scandal-hit North Manchester General Hospital in December. The 37-year-old's death came just months after three babies and one mother died at the maternity unit. The deaths, along with those of four babies and two mothers at the Royal Oldham Hospital prompted an investigation. Today Ms Hindle's partner Chris Barnes and his sister Karen have called for action to prevent further tragedies. Chris Barnes, whose partner Lianne Hindle died three hours after giving birth to their daughter Poppy (pictured with brothers Zac and Louie), is calling for action to prevent further tragedies at North Manchester General Hospital . The 40-year-old father-of-four said: 'Something has to be done. It isn't right. 'This is still happening. Maternity units are supposed to be the safest places to have babies.' Mr Barnes, who suffers with cerebral palsy, has been left to care for the couple's three-month-old daughter Poppy, and her three brothers, Morgan, 15, Zac, nine, and Louie, seven. North Manchester General and the Royal Oldham Hospital called in independent experts to review its maternity units after the spate of 10 deaths in the eight-month period from December 2013 to July last year. Ms Hindle, from Bury, died in December - her death falling outside the scope of the investigation. She went into labour at almost 35 weeks pregnant, in the early hours of December 15. The expectant mother was scheduled to give birth at St Mary's Hospital, which has a specialist intensive care baby unit, after suffering two previous stillbirths, and three premature pregnancies. But she was taken to North Manchester General by ambulance instead, after it became clear she was going to give birth before she could get to St Mary's. This is the only picture Ms Hindle's family have of her holding daughter Poppy . Immediately after welcoming baby Poppy shortly after 2am, Mr Barnes said his partner appeared 'fine', holding the newborn and naming her. But just an hour later,  she started to feel unwell  - complaining that she was 'red hot'. Ms Barnes described how Ms Hindle started to look 'deathly white', and felt cold and clammy to touch, before her eyes began rolling back in her head. Her blood pressure and heart rate plummeted as her condition deteriorated and she died at around 6am after suffering a cardiac arrest. Ms Barnes said the family has concerns about the care Ms Hindle received, claiming she was left alone with a student midwife following the birth, once the placenta had been delivered. 'Lianne was repeatedly talking of how red hot she was, asking for a fan and the windows to be opened,' Ms Barnes said. 'The student midwife said that was normal after having a baby and wafted her with a sick bowl. 'I didn't see Lianne's temperature taken once.' Ms Barnes claimed at one point, a member of staff came into the room and asked the student midwife: 'Who are you supposed to be with?' To which the student replied, "exactly", Ms Barnes said. Ms Hindle's family said no one from the hospital had contacted them since her death. Ms Barnes added: 'That makes us feel that she just wasn't important to them.' Mr Barnes, who suffers cerebral palsy, has been left to care for the couple's four children, Zac, nine, Morgan, 15, three-month-old Poppy, and Louie, seven . A spokesman for The Pennine Acute Hospitals NHS Trust said: 'Our condolences go out to the family in this tragic case. 'Lianne was diverted to us as an emergency on the way to another hospital. 'She was not previously known to our maternity service and while her baby was delivered safely, tragically Lianne subsequently died. 'We are unable to comment further as this case has been referred to the coroner and has not yet been heard. 'We deliver 10,000 babies each year and would like to reassure families about the safety of maternity services at our hospitals, but if any expectant mother has a concern they can contact their designated midwife to discuss this.' Mr Barnes said: 'Lianne had always dreamed of a little girl. She was a strong character and loved her family. Her death has shocked and devastated us. It doesn't seem real. 'The boys have been pretty resilient but Louie is a mummy's boy and recently has been waking up in the night and crying out for her. That has been hard to take.' A date for her inquest has not yet been set. An investigation was launched at the North Manchester General Hospital after the deaths of three babies and a mother at the hospital between December 2013 and July last year. The probe also looked at the deaths of four babies and two mothers at the Royal Oldham Hospital over the same time period . A catalogue of failings have been uncovered at two NHS hospitals after seven babies and three mothers died there in the space of just eight months. Independent investigators were called into Royal Oldham after the deaths of four babies and two mothers, and North Manchester General after the deaths of another three babies and one mother. Lisa Parkisson, 35, died at Oldham Royal 48 hours after giving birth in April this year, while newborn Thomas Beaty died at the same hospital in June after doctors pushed him back into the womb during birth. A summary of the investigation, which was kept secret from the families of the dead until now, has been seen by MailOnline and found 'notable absence of clinical leadership' in the maternity wards, and a 'failure to adequately plan care' in a number of cases. Lisa Parkisson, 35, (left with son Zac) died 48 hours after giving birth at Oldham Royal in June last year. Thomas Beaty (right) died from  at the same hospital after doctors forced him back into the womb . A team of independent investigators also found risk management was 'below standard' in some cases - though there were no apparent 'deficiencies in care' in the deaths of the three mothers. The report noted that several of the mothers were obese or morbidly obese, which can lead to complications, but that national guidelines for treating overweight people were not followed. Officials also criticised the hospital's own investigations, saying the root cause of the deaths was not always identified, opportunities to learn lessons were not always picked up, and that some recommendations were too general and difficult to measure. All of the deaths are believed to have occurred between December 2013, and July last year. Pennine Acute is in the process of producing an action plan based on the recommendations from the findings. They include strengthening clinical leadership and risk management, making sure enough staff are on duty to ensure safety and reviewing the process for employing temporary locum doctors. Gill Harris, chief nurse at Pennine Acute, said last week: 'The Trust is always keen to learn and to improve care. We commissioned a review by experts from outside the Trust to look at the details of a small number of maternity cases at our hospitals. Independent investigators found failings in care and hospital leadership at Oldham Royal following the deaths of four babies and two mothers there in eight months . 'We are now considering that report and are developing a number of actions as a result to make some improvements to ensure we continue to provide the best quality of care for our patients. 'We deliver 10,000 babies each year and would like to reassure families about the safety of maternity services at our hospitals, but if any expectant mother has a concern they can contact their designated midwife to discuss this.' A spokeswoman for the Care Quality Commission, the health regulator, said: 'CQC is aware that Pennine Acute Hospitals NHS Trust has recently initiated an external review into its maternity services and we are in close liaison with the trust, NHS England and local CCG regarding the review findings.'
Lianne Hindle suffered a cardiac arrest at North Manchester General . 37-year-old died three hours after giving birth to baby Poppy . Investigation was launched last year into the deaths of seven babies and three mothers at the unit and a ward at the Royal Oldham Hospital . Family have raised questions over the standard of care Ms Hindle received .