I hope there's a helpful echo nearby, so that your yodel can come back to you like fairy notes across the mountain. (Also it's a pretty magical echo, I noticed when re-reading Oberland - Dickie makes some kind of noise compared to a dying bull or something, and it still makes a pretty echo!)
New Beginnings takes place I think three years after the end of Prefects - Len is back from uni, engaged and planning her wedding but taking up a post at the school in the meantime. Con is also back home, and writing. (Con's story depresses me a bit in this, although it's not that anything 'unhappy' happens, but I like her story in CGGU much more. But I am quite certain New Beginnings has it exactly as EBD would have.) Jack Lambert is head girl, so you get Wanda, Jane etc as prefects.
It fits seamlessly into that era of the CS - no big changes and nothing unexpected. I don't think I'll read it again, but likewise I'm not sure I'll ever read any of the ones later than New Mistress again (and even the earlier Swiss books, I'm not exactly inspired to return to any time soon).
It finishes up with Len's wedding, which is after Christmas so I think the whole book is only a term long. I can't swear to that though - it could be a year and a term - I did start to skim a bit towards the end.
All in, it's a serviceable fill-in. But not in the same league as Taverton High or CS Headmistress. I am v much looking forward to the forthcoming prequel-prequel!