For those in the hold pool...
I just called the HR depmt. Thought, it wouldn't hurt to get back in touch after another two months had passed. I was told: No start before next year. So basically, nothing new. I thought I'd let you know, though, as September is approaching and things seemed a bit likely to change around that time... However, the year is growing quite old by now and I keep my fingers crossed for all to be scheduled for TR soon next year!
Many kind regards