Download ‘Nokia Here’ (now called ‘Here we go’), which has downloadable offline maps for Europe. It’s just got me from Scotland to France with no problems.
It’s better than TT too, imo.
I’ve used both, and CoPilot as well, and I’ve made the decision to install and pay for TomTom, it’s the best app if you actually have to rely on satnav for your job, as I do. Functionality isn’t that different, but the actual mapping shown onscreen is superior, the close-up detail at junctions, and the clarity of roads while moving is much better, TT’s roads tend to be bolder and clearer, the free apps are less clear, but then they’re free, and are perfectly adequate for occasional/weekend/holiday use.