Washg up bowl so that is gthe sink is piled high he can still wash his own dishes.
I wouldn't do Ikea for plates, every other student will so they all get mixed up and no one claims the broken ones - get from charity shops instead, little old lady type plates that no one will knick.
tin opener / bottle opener / corkscrew or maybe a swiss army knife.
Bedding with extra pillows - order some to be delivered to halls.
A book with everyone's birthdays in and cards if they would normally send them. Also everyone's phone number in case he loses his mobile.
Some warm clothing, this probably applies more if they don't come home at weekends but they go to uni at the end of summer and before long it's freezing.
Flip flops for the shower.
A big notice to pin in the room saying, "register with a Dr and a dentist"
A small first aid kit with a strip of paracetamol added.
Check on payment schemes, I've been to more than one uni but I think the best payment scheme was at UCLAN, you had a card that you load with cash which you used to pay for things on campus at a discount, You could buy food and non alcoholic drink (unless with a meal) library fines, stationary and books and the card could be loaded by the student or other interested parties.
Yes to the mini fridge, I got mine when Rubalows closed down and after 20+ years it was still going, I left it for someone else to use and as far as I know is still going strong.
It will need to be PAT tested but most unis set up PAT testing.
How close to halls will his lectures be? If it's a bit of a distance he might want a flask or contigo type mug.
T V licence if he has a TV, student halls are excellent places for the licencing people to find unlicensed TVs.