Update - Budapest

Just a quickie - It seems the first planning hurdle has hit. The hotel in Belgrade which has my credit card number and a reservation may be no longer in business. It is impossible to find out, all I know is that their website (hotelroyal-bg.com) has vanished and their two listed numbers ring out. The people here in Budapest are trying to help me find new accommodation. Anyway, off to the train station to get my ticket. I'll post a more informative update later.