The Crown Prosecution Service says it is "taking steps" to withdraw the European Arrest Warrant against the parents of five-year-old cancer patient Ashya King.
"No further action will be taken against Mr and Mrs King and we are now in the process of communicating this decision to the Spanish Authorities so that they can be reunited with their son as soon as possible," the CPS said in a statement.
Ashya King's parents told the Daily Mail they fled the UK after being told NHS treatments would leave him with life-long disabilities.
The head of the police force which applied for a European Arrest warrant against the parents of Ashya King has now urged their release.
A British mother whose son's life was saved by proton therapy has told ITV that she defied NHS doctors' advice to pursue the treatment.