I have a deal of sympathy for their position. As I understand it the only crime he was charged with was one count of child abduction and, given the circumstances being that this was "statutory" due to her age as she went willingly, I think (hope) the sentence will be on the low side of the scale.
I think he has been unfairly branded a paedophile by some - she is not and doesn't look like a child. He knows he's done wrong and expects to be punished which is, I think, why he never applied for bail. He knows he will get jail time and so started it as soon as he could so that it would come off his tariff and he would be out sooner. Given this, and the fact that his sentence may not be too long, I think he'll be out a lot sooner than you expect Vernon.