A BEREAVED parent and campaigner received a voicemail calling her a ''vindictive, unpleasant and nasty cow'' from someone claiming to work at a controversial health trust.

 Dr Sara Ryan, the mother of 18-year-old Connor Sparrowhawk, who was known affectionately as Laughing Boy, has called for those responsible to be brought to account since her son drowned following an epileptic seizure while under the care of Southern Health NHS Foundation Trust.

The woman who left the voicemail message on Friday, April 29 can be heard to say: ''Good morning, hello, hi, this is a message for Dr Sara Ryan. I've been seeing on the media about your son, your poor son that died in the care of Southern Health.

''I work for Southern Health and I feel awful that you lost him. I'm so sorry that you have done, it's tragic, and I hope you find some closure after the report, the issue of the GM CQC report today, but I do think you are being very vindictive.

''I think you are a vindictive cow, on TV all the time, slating the NHS and Southern Health.

''With your intelligent background you know as much as anybody else knows that Southern Health only took over those units in Oxfordshire recent, you know the recent months before your son died.

''You know, with your background, it takes a while to make changes in anywhere and I think now you've just become a (inaudible) and you want some attention but you are vindictive and you are unpleasant and you are a nasty cow.''

 Dr Ryan said in her online blog: ''The call is vitriolic, nasty and beyond inappropriate. But it's simply part of a set of improbably, inappropriate, nasty and worse responses we've endured since LB died.

 ''Evidence of a system in which defensiveness, bullying and family crushing flourishes.''

A Southern Health spokesman said the trust would carry out an internal investigation into the call.

 He said: ''We have been made aware of the phone message through social media, and the content is deeply concerning. The Trust cannot condone such behaviour and we take matters like this extremely seriously.

 ''We urge anyone with any information to get in contact with us so a full internal investigation can take place.''

 Shadow mental health minister Luciana Berger called on Tuesday for the chief executive of Southern Health to be sacked after the Care Quality Commission (CQC) report published last week found the trust was still failing to protect patients from risk of harm.

 An independent investigation found in December that it had failed to investigate hundreds of deaths since 2011.

 Ms Berger said the CQC report suggested ''very little'' had been done to improve the performance of the trust.

 Health Minister Alistair Burt admitted the report made for ''disturbing reading'' as he said the Government had not ruled out the possibility of an inquiry.