The EU have boosted the argument for our own system; what's the point in our paying billions to share a system that they may to choose to lock us out of, either now or at some point in the future, perhaps when we urgently need it?
They've also given a financial incentive to go it alone; not a single penny we pay towards Galileo will now go to a British worker or company. At least the spend on our own system would remain within the UK economy