Thanks, Clemens and Sammy. Fab flat in a great location; only a few minutes' walk from Kettenbrückengasse U-bahn station, the Saturday flea market and the food stalls of Naschmarkt. The flat is quiet, beds are very comfortable, bathrooms spacious and all very clean. Note: the second (smaller) bedroom has en-suite shower and basin, with a separate loo across the hallway. Communication and access arrangements worked well and a key-safe by the street door makes the arrival easy. Would stay there again if I revisit Vienna. Graham