The law appears to be on the side of an Islamic State bride, seeking to go back to the United Kingdom.

Shamima Begum wants to return home, after giving birth to a baby boy at a Syrian refugee camp.

But the 19-year-old says she has no regrets about leaving to join IS when she was just 15.

Counter terrorism expert Will Geddes told Mike Hosking the law is clear about giving statehood, to stateless Britons.

"This particular individual is in a position where she is entitled potentially to return to the UK, however, there will be many conditions around that."

However, he said the British government will be worried about opening the floodgates.

"About 800 Jihadi fighters that they have imprisoned over in Iraq and Syria are potientially going to be released and come back, or try to come back to the United Kingdom."

Helen Clark has entered the debate over Begum's future.

She believes the teenager was a child when she was radicalised and says Begum should be allowed back into the UK to face the justice system there.