There are several streams of data from Galileo, one of which (stream 5, IIRC) is encrypted for military use. The problem is that the algorithms for the encryption method are already up for sale to China; this is one of the many reasons I think Galileo represents the EU shooting itself in the foot. Not only is it going into direct competition with the long-established and industry-standard GPS, but it's also thumbing its nose at the US by enabling China to develop a Cruise capability. Even the Russians won't sell military-standard GLONASS algorithms to China, for God's sake.
The UK would do well to steer clear of this. We have preferential access to GPS M-code already; why involve ourselves with this orbital white elephant? It's going to be costly, ineffective, and expensive to run. Another colossal waste of European money.