I’m way past being a student myself but a quick search of the pipes shows many options with probably the top one being a fee free overdraft which increments each year to a max of around £2,500 - £3,000.
The overdraft should be a guaranteed one with flexible and friendly payback/reduction terms after graduation (my eldest  had to pay his back almost instantly).
As a follow up to this the ability to “lock” the account from further spending if it hits a certain limit and / or the overdraft limit.
No fees - you’ve got this one covered
Some sort of freebie - such as a student railcard for the duration of their Uni days / 3yrs
ermmm… I’m struggling but perhaps a quick look here:
will reveal what banks are offering and this next link shows things a student should consider so Starling could look to match those ideals or come close to!