Our head was forced to leave about a year ago- same as you- no notice. he didn't even get to say goodbye, here one day , gone the next. we had a super head drafted in for a year- which was stressful - and now have a new head and things are calmer.
I think our head went because he hadn't met targets and wasn't being seen as taken on county advice. we had had a satisfactory Ofsted and a dip in KS2 results. But , to be honest, we never really knew, it was just rumours.
Hope things sort them selve out soon, it is an uncertain time.
Have you heard any more? The previous head at my school went, along with the whole governing body, but that was a combination of factors and was done with enough notice to get a new head, not a march-off-the-premises job.