A FATHER'S campaign to change the law following the death of his son from a treatable condition has won the backing of a senior politician.

Plaid Cymru leader Leanne Wood has said the party is considering support for a 'Robbie's Law' to be introduced, giving next of kin an automatic right to 'unfettered access' to a loved one's medical records.

Will Powell, of Ystradgynlais, has been campaigning for the introduction of such a law, following the death of his son, Robbie.

The intervention comes as a new TV documentary has promised to shed light on what it calls an 'extraordinary political twist' in the case that is now entering its 23rd year.

Wales this Week http://www.itv.com/news/wales/story/2013-01-09/the-robbie-powell-story/&quot">http://www.itv.com/news/wales/story/2013-01-09/the-robbie-powell-story/" target="_blank">The Robbie Powell Story, will be broadcast on ITV Wales on Monday, January 14 at 8pm.

Robbie, who was just 10-years-old, died in 1990 from Addison's disease, a treatable condition.

Last year First Minister Carwyn Jones apologised to Robbie's family for failings in his care highlighted in an official report - and said they had been 'let down' by the system.

Mr Powell, who has alleged an official cover up into the circumstances surrounding his son's death, is continuing to campaign for a full public inquiry and the change in the law, placing a 'duty of candour' on doctors.

Writing in her http://www.english.plaidcymru.org/the-slate/2013/01/10/justice-for-robbie-powell/&quot">http://www.english.plaidcymru.org/the-slate/2013/01/10/justice-for-robbie-powell/" target="_blank">blog, Ms Wood said a 'Robbie's Law' could outlaw the deletion of entries in patients' medical records as well as ensuring the records are available to next of kin.

Ms Wood, wrote: "'Robbie's Law' could include two primary provisions. Firstly, to outlaw deleting entries in patients' medical records. The ability to retrospectively amend medical records would remain but in the interests of transparency, all previous entries should be visible. The second primary provision would be an automatic right for next of kin of deceased patients to have full and unfettered access to their loved one's medical records."

Ms Wood also said she believed a full public inquiry should be held into Robbie's death. A public inquiry would be able to examine the role of Dyfed Powys Police and the Crown Prosecution Service.

The report published last year was unable to look at the roles of both bodies as they are outside the responsibility of the Welsh Assembly.