To answer your question (which has been downvoted for reasons I don't really understand): Galileo is a EU project. It's only available to EU members. The UK con

To answer your question (which has been downvoted for reasons I don't really understand): Galileo is a EU project. It's only available to EU members. The UK contributed heavily and helped shaped it, but it was never meant to be usable by non-EU states, and you've got to be signed up to various agreements that could be summarized as "being in the EU". Legally, it belongs 100% to the EU. So, could we have negotiated an ongoing part of Galileo? Yes, probably, but it would have involved a longer negotiating period and a number of compromises and continuing engagement with EU institutions. None of these were calls the government were prepared to make. Instead, they didn't even ask and just walked away from the project. Needless to say, this is just a microcosm of the many things you have to accept if you take an absolutist stance on EU engagement.