Sorry I haven't been around much - we have got family staying with us this weekend.
I only gave the basic facts in my OP as that was the issue I wanted clarification on in my own mind before I went for my meeting with the Head (and those were the facts as given to me by the Head).
I don't think DS1 at 5 had any real understanding of what he said. My guess is he was possibly trying to sound 'cool' in front of older classmates? I am obviously sorry that another child was upset by something my DS said but I am sure there are many worse things said by many children in the course of a school day that do not result in more than half a days punishhment.
However those of you who guessed that there may be a bigger picture were right. The bigger picture is that DS1 has been unhappy and unmotivated at school since xmas (co-inciding with the absence of his regular class teacher) resulting in a general deterioration in his behaviour.
I became concerned before half-term as he was becoming increasingly reluctant to go to school and his mood and behaviour were going downhill at home as well. So I approached the school and began to get bits of information in dribs and drabs.
I have been in to observe in the classroom and I booked the apppointment with the Head so feel I have been fairly pro-active and supportive.
I have asked the Head (in the absence of the regular class teacher) to consider and help me address what has caused the deterioration in his behaviour. I do feel he needs clear boundaries regarding behaviour but simply clamping down without addressing the root of the problem does not seem like a recipe for success to me. In fact I think it is further demotivating. There is no support for him to try to change his behaviour but he is being watched like a hawk. I feel like he is being set up to fail.