All a bit orthogonal
- The UK is already well-committed to ideas of congestion charging and user-pays and the likes, so don't expect voting "leave" to stop that. Indeed anybody expecting the BrExited UK state to be freedom-loving and transparent probably hasn't paid enough attention to the past couple of decades
- Satellite-based toll charging already exists, using GPS, so even if Galileo doesn't "facilitate" it (? other than better resolution what does it add to GPS?) govts can pursue it just as merrily
- Compulsory satnav would indeed be terrifying - a nation commanded to "turn around where possible" rather than just taking whichever route they want. But I guess you mean "location tracking" rather than navigation?