They are supposed to do through connections with OS, HOWEVER....
I was booked BHX-ZRH-BKK-VIE-BHX last September with a lengthy connection in VIE, but the SEN lounge is not a bad place to wait. Then they retimed the VIE/BHX from lunchtime to very early morning, making the connection impossible. I was re-booked on LH via FRA but I had to suffer LH C class long-haul, something any sane solo traveller should avoid - fine if you’re flying with a close friend, but I do not like playing footsie with a complete stranger for 12 hours.