Yes. First she traveled to Turkey, from London. From there she went to the ISIS territory and lived there for some time. You asked me why the UK intelligence agencies were unable to stop her, before she crossed over to the Caliphate. The reason is that she was not under surveillance at that point of time. And now she has returned to London (Caliphate was probably too boring ). May be she will return to the Caliphate sometime later, when she gets bored of the London life again.
Oh I see now, so that woman has became member of ISIS right? I think she haven't joined ISIS yet, and the authorities arrested her before go to ISIS territory. Yeah maybe she need a relaxation after joined the war