A brilliant scientist killed herself under a train because she was worried she was a bad mother to her two young children , an inquest has heard . Sarah Bradley had a successful career as a chemist at a pharmaceutical firm , but she struggled with bi-polar disorder . The 43-year-old mother told one of her son 's friends that she was a 'bad person ' , and claimed that the boys - both aged under 12 - would be 'better off without her ' . In September last year , she failed to show up for dinner with her estranged husband Adrian , and her body was later found next to the railway tracks near her home in Boxford , Berkshire . Mr Bradley told the inquest in Newbury that he had often tried to reassure his wife about her parenting skills , but she refused to accept it . He said : 'Sarah would constantly say she was a terrible mother , people like her should n't have children and the children would be better off without her . She had constant feelings of inadequacy as a mother . 'When she was n't in a low mood she was the life and soul , she was a wonderful person . ' The inquest heard that Mr Bradley had raised concerns about his wife 's mental state , but she was discharged early from a mental health unit and doctors failed to record her husband 's warnings . The couple , who both had doctorates first got together in 1995 , and were married in 2001 . They moved to Boxford after Mrs Bradley completed her chemistry PhD at Bristol University and started working for Bayer , a multi-national pharmaceutical company . However , they separated in February last year after Mrs Bradley 's bouts of depression became more and more severe . The inquest was told that the pair had been due to meet up for dinner with their children on the day that she died , and that she may have chosen this moment to kill herself because she knew her sons were safe with their father . When she did not turn up Mr Bradley rushed around to the family home where he found her keys in the front door , her car missing and 14 letters arranged on the dining room table addressed to friends and family . Her body was found by police two miles away . The afternoon before , she had tearfully told a schoolgirl who was friends with her sons : 'You are good people and I 'm a bad person . Make sure you look after [ the boys ] for me . ' Mrs Bradley 's family claimed that her husband had driven her to her death by subjecting her to 'emotional abuse ' , the inquest heard . In a statement her sister Rosie Mclauchlan , said she believed that Mr Bradley 's behaviour 'contributed significantly ' to his wife 's depression , adding : 'Adrian told Sarah constantly that she was mentally ill. ' But coroner Peter Bedford said that this was 'at best an over-simplification of the situation ' , adding : 'Sarah herself conceded in conversation that some of her expressed views had been delusional . ' Work : Mrs Bradley was a chemist at pharmaceutical firm Bayer , whose headquarters in Newbury are pictured . Asked about the allegations , Mr Bradley said : 'From my point I loved Sarah very much and I did all I could to care for her for over 20 years . 'Possibly I did the wrong things , but I did my best and I certainly could not have done any more . ' The coroner took the rare step of criticising hospital authorities for the failings in Mrs Bradley 's care after they ignored Mr Bradley 's warnings . An independent investigator said that it had been 'unwise and potentially dangerous ' for doctors at Prospect Park hospital in Reading to fail to record her husband 's comments . Mr Bradley tried to tell the hospital that they were wrong to discharge her , adding : ' I think Sarah may have felt completely on her own at that stage . ' Recording a narrative verdict , Mr Bedford ruled that Sarah 'took her own life whilst suffering from depression and bi-polar disorder . ' He added that she had been 'discharged prematurely from the community support programme in September 2014 and without psychiatric review while expressing suicidal ideas . ' Speaking after the hearing , Sarah 's lifelong friend Helen King said : 'She was incredibly talented , she was very musical and her singing voice was beautiful . 'The only word to sum her up would be nurturing . She was so loving , she gave so much of her love to other people . 'She was , contrary to what she thought , the most loving and attentive mother . She was absolutely amazing with the boys and it 's tragic she could n't see that . There was so much love coming from her . ' For confidential support on suicide matters in the UK , call the Samaritans on 08457 90 90 90 , visit a local Samaritans branch or click here .
Sarah Bradley had a chemistry PhD and worked for pharmaceutical giant . But she struggled with bi-polar disorder . She was diagnosed in the early 1990s, but it took her until 2003 to get treatment.