As a new user to 212, here are my thoughts on what could be possibly made more clear for the end users:
Under ISA depositing funds, having a tooltip mentioning the process for transferring existing ISA’s to Trading212. (Such as - contact email@example.com if you wish to transfer past years ISA subscriptions.) + a warning stating only the current years subscription can be transferred via card/bank transfer. All prior years would need to submit an ISA transfer form.
A place to view account numbers. I had to post a question on the forum to get access to my ISA Account number. If this has to happen for each ISA transfer, this must annoy the IT team maybe.
Hope this helps. I’m sure this is not a big thing to implement, but may help to reduce unnecessary emails.