Sorry if long but will put details down. Our nanny is leaving in 3 weeks as is going home for family reasons (father very unwell). We have a replacement who dd 4 knows (I also have a baby dd 6 months).
We have two nannies as I am currently have health issues so need extra help (have been in/out of hospital which although dd copes well with gives a bit of an uncertain background of late). So dd1 does know and like replacement (although has been some playing off with outgoing nanny which is to be expected).
Nanny will be leaving as dd goes on holiday too so will be a gap before not seeing her daily. We do plan keeping in touch.
When is best Time to tell her - was thinking a week or so before ? And also do it in a matter of fact way (we are talking about nanny going home to look after her pets as rightly/wrongly don't want to put any worry into her head about "sick parents" given how I have been).
Sorry for such a long post but being bit pub (me being ill, arrival of her baby sis, starting reception in sept and this is lots for dd to take on board so want to support her).