10/09/2014 10:48 BST | Updated 20/05/2015 10:12 BST

Ashya King: Dad Claims Authorities Threatened To Take Son Into Care For 11 Years

PRAGUE, CZECH REPUBLIC - SEPTEMBER 08: Five-year-old Ashya King, who is suffering from a brain tumor, is touched on his forehead by his parents Brett and Naghmeh King on his arrival at the Motol Hospital on September 8, 2014 in Prague, Czech Republic. He is to receive cutting edge proton therapy treatment for his conditions. The boy was taken by his parents from a hospital in Southampton, southern England, 11 days ago in an attempt to get better treatment. They were arrested following a search across Europe as English doctors feared for the boy's welfare. After a public outcry in Britain, they were released and free to travel to the Czech Republic. (Photo by Tomas Krist/isifa/Getty Images)

Ashya King's dad Brett claims British authorities threatened to take their son away from them for 11 years after he challenged doctors over his treatment.

He said he and his wife Naghemeh fled abroad with Ashya after being warned he would be taken into care until he was 16 with no contact with his parents or siblings.

Brett made his claims as Ashya made his first visit to the Prague clinic where next week he will start proton therapy to treat a brain tumour.

He has had MRI and CT scans, which discovered the tumour hadn't grown any bigger.

Doctors at the Czech clinic say treatment will give Ashya a 70 per cent chance of survival.

His father, Brett, said Ashya was a 'bit traumatised' after the prolonged legal battle that saw him taken from Southampton to Spain before arriving in Prague on Monday.

Article continues after this video.

Ill British Boy Arrives in Prague for Treatment

British doctors opposed the plan to take Ashya to the Prague clinic, saying it was not suitable for his condition, but the family disagreed and sparked an international manhunt when they removed him from hospital without permission and took him to the continent.

Brett said: "They said to me if I question anything and ask questions as a father...they would take my son away from me, not just for the treatment but until he was 16.

"I wouldn't be able to see my son for 11 years.I said to my wife this is something so serious that our son could be taken away until he is 16.

"Eleven years without us, he wouldn't know his parents, his brothers, his sisters or anyone.

"We knew we couldn't let that happen.

"We couldn't question them any more. We couldn't let them know our feelings because one mistake on our side and they'd take him away."

Ashya hit the headlines when his parents removed him from Southampton General Hospital against the advice of doctors, leading to an international manhunt that saw the Kings imprisoned in Madrid for 72 hours.

The couple were released amid a public outcry, while Ashya received treatment in Malaga's Materno Infantil hospital.

The article continues after this video.