A possible alternative would be to get a boat to Le Harve and come down through France before swinging East. I rode London - Biarritz this summer and Normandy - The Loire Valley - La Vienne - Perigord - Dordogne etc was all truly lovely. I don't know much about the route you're taking but it's another option I guess. You could still get plenty alpy coming at it from this direction...
A possible alternative would be to get a boat to Le Harve and come down through France before swinging East. I rode London - Biarritz this summer and Normandy - The Loire Valley - La Vienne - Perigord - Dordogne etc was all truly lovely. I don't know much about the route you're taking but it's another option I guess. You could still get plenty alpy coming at it from this direction...