[eeh]

I don't know what motivation is, but there's a few plausible options:

* the UK may not want critical infrastructure provided elsewhere

* the UK may have research/student folk who would have previously worked on Galileo, but now cannot

* the UK may want to fund this as a vehicle for space research in general

[spzb]

Most plausible:

* UK wants a big vanity project to show how much better they are out of the EU

[eeh]

I don't know which is most plausible.

What makes you think that is most plausible?

[spzb]

The last four years of living in the UK

[eeh]

Ah, the classic "the government cannot do a good thing, therefore this must be a bad thing".