A few question regarding overnight sleeper trains. On the Trenitalia website for the Thello train, for a 4 berth couchette, for position it says alto, basso and basso obbligatorio. Which of these is the bottom berth? According to google translate, alto means high, basso - low and basso obbligatorio - low mandatory.
Can you choose which berth you want if you book on the Thello website? I'd gone as far as the passenger details but didn't see any area for this, unless it is after you've added those details. Of the two websites, which would you recommend to use?
On another website, I read that the Thello overnight trains would no longer be running past Milan after the 15th December - could someone confirm this?