Take a deep breath, people. You're all getting outraged over a non-story.
This is about a girl from London who is now in a camp in Syria. A Times journalist bumped into her and realised who she was. When interviewed she expressed a desire to return to England for her baby to be born. That's it, that's the whole story, end of.
Still outraged? Let me explain further.
She has taken no steps to contact a consular official (not least because there are none in Syria, for safety reasons) and she is nine months pregnant so she certainly won’t be back in the UK for the birth. In all likelihood she won't be back in the UK for years, if ever.
If in a few years' time she somehow does manage to get to a consulate then unfortunately as a British citizen she has the right to come back. I don't like this any more than anyone else posting here, but it is international law that a country cannot leave anyone stateless. Whether we could or should allow it becomes an irrelevance as we have no choice in the matter here, like it or not she's our problem.
This sounds morally wrong I know but if it helps any, think about this the other way around: if we had say a French terrorist in the UK and wanted to deport them, and France said "non," how would we feel about that? We want unsavoury foreigners in the UK to go somewhere else yet also want unsavoury UK citizens in other countries to go somewhere else? We can't have it both ways.
Should she ever return to the UK then she will then be interviewed, probably charged, stand trial, and potentially be imprisoned for a very long time in accordance with English Law just like any other suspected criminal.
TL;DR - There is absolutely no chance whatsoever of the UK flying her back tomorrow to give her a free council house and let her start up an ISIS cell in Bethnal Green, despite how many newspapers that story might sell.