I want to plan a train journey from Grenada in Southern Spain to Lille in Northern France at the beginning of September. I assume it is possible to travel from Grenada to Madrid and from Biarritz to Lille (via Paris) but would like advice how to get from Madrid to Biarritz by the quickest route. I haven't been able to locate timetables for the rail service in Spain and would appreciate advice on appropriate web sites for this.