So two-thirds of teenagers in the UK don't like religion and don't believe in God. That's a good thing.
What would be nice is if these kids would follow up this natural doubt with actual studies, both into science and religion, to see why the verifiable methods of science can be reliably trusted and the unsupported fables of sheep farmers thousands of years ago can be just as reliably relegated to the category of "Quaint Historical Curiosities."
There is always the likelihood that some of this is just teen rebellion, going through a phase, what have you. But when you consider how religion has lost favor among the British public in general, it could very well indicate a healthy trend towards greater secularism on a society-wide scale. And it's a valuable rejoinder to the accommodationists and religion-defenders who lazily shrug and insist that we just can't get rid of religion, or expect it to go away, because, you know, deep down, everyone needs it.