Your son is moving into student accommodation, not a new house.
At best it’ll be as big as his room is now.
The thing to do is start with the bare minimum. Basic clothes, basic kitchen equipment, basic wash stuff.
Otherwise, not only will he find that he has a LOT of stuff, people will just steal it anyway
For me, some handy things I wish I’d taken:
Good mattress topper -
https://www.johnlewis.com/john-lewis-partners-synthetic-soft-touch-washable-dual-layer-6cm-deep-mattress-topper/p1519431?size=double,-135-x-190cm
A pack of cards. Bottle opener. A good bowl for cereal. Oxford campus notebooks are the nicest quality. Basic biros in black, blue, red.
Don’t bother with the recipe book. You’ve got something called the internet.
The important thing is don’t overthink it, and let him figure out what he needs
Good ones - ta.