Hampshire police have provided an updated phone number for people outside the UK to call to provide information on the whereabouts of Ashya King:
Anyone with information which may help us locate Ashya King should contact Hampshire Constabulary as soon as possible on 101 quoting Operation Aquilion.
From outside the UK, please call us on 0044 1962 841534.
In France, please call the emergency 112 number.
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.