Hi
@kelmarie1983 Sorry to hear this, I am shocked yet not surprised as type 1 care in schools still needs alot of work. Diabetes UK has been campaigning for better care for kids with t1 in schools, they have a helpline which I suggest you call to get further support on this:
https://www.diabetes.org.uk/Guide-t...and-diabetes/Schools/Care-in-School-Helpline/
Ultimately you need to speak to and agree a plan with your DSN about his healthcare to support him at school, as well as appointing a nominated person at school to monitor his condition and back up for when they are away. If you have this already then you need to make a formal complaint through the Governing body of the school to find out why he was not supported.
Try not to get angry/upset, it can be resolved however now this has happened it will highlight the importance of getting the right support in place for him at school, let us know how you get on.