November Hiking Europe

Got a week off in November and want to get some miles in, looking for suggestions.

Background:

  1. Experienced hiker in British conditions
  2. Distance flexible but would like a challenge. 4-7 days probably
  3. Would ideally prefer some decentish weather
  4. Anywhere in Europe, live in London so can get anywhere easily
  5. Not looking to camp so hotels/guesthouses etc necessary

Very open minded, would love to get some suggestions!