Swiss Railways train in Zurich Station
Thanks to investment in the High-Speed Network, for several years it has been possible to take daytime trains from London to many parts of Northern and Eastern Spain. This is not quite so easy for those living further away from London or not wanting a long daytime journey with one or more changes along the way. However, there are many places along the way which could make a very pleasant stop-over to break up the journey. Have a look at this link for some interesting ideas :-
https://www.youtube.com/watch?v=vGR3ipqyjes&list=PL8w-BAm7lVzfnTCJauwicMo0-eeYPkE0h