It is very hard here in France to get any information about schools and their standards.
So we ask around. My younger stepson, who is at the top of his class in a state primary school in rich-and-comfortable Neuilly-sur-Seine, panics when asked to write a text of about three sentences long.
Other parents say that their children in private primary schools have a similar level of writing ability.
What would you expect in the UK? My memory is that we did essay writing in primary school (private all girls in the 1970s) but does my memory serve me well?