Yes. It’s worth googling the ‘coke bottle effect’ and anger in kids, which explains how children can struggle to contain emotions and then explode, often seemingly over the little things (but which have become huge to them) Have you talked to school about any issues there? Do they have a learning support person who might be able to shed any light or help? Also perhaps consider speaking to a play therapist for a child of that age about whether some support would be beneficial; or a counsellor/psychologist who supports parents, so you can have a chat about how you can help him manage it (and feel supported yourself in doing so)
Found! I found a black mobile phone on Friern Rd close to the junction with Goodrich Rd this morning at about 8.50AM. I have handed it in to Goodrich School office for safekeeping.