Thank you for comments/lecture - I'm perfectly aware of the risks when travelling separate tickets. I don't share your risk aversion; as long as MCT is complied with I have no issues travelling on separate tickets (hand luggage only). I have 40 min at VIE and often the BR flight arrives early (and is hardly ever delayed). There should be enough time to clear immigration and security early in the morning. In the unlikely event that I miss the flight, I take it from there.

However, your comments do not really address my Q: What is the MCT for BR to OS at VIE?