Another recruitment/admissions staff member here - just wanted to add some other pieces of info to the useful advice in advance of Thursday! (Apologies for any duplicates!)
UCAS isn't live with university admissions systems, it works on a bulk upload/download process. So we don't see what applicants have done (i.e. accepted their offer), or other university updates, immediately - and similarly students don't see our updates straight away. We get so many repeat and panicked phone calls about this because no one ever tells students this!
Secondly, when you add a clearing choice AFTER being made a verbal offer from a uni, UCAS will say that we're "considering your application" - again nothing to panic about. It just means that when we get students information (in the next upload), we can match up what is on the system to what they've told us on the phone... it's amazing how many Ds can become Bs etc.
(As a side note, if you add a Clearing choice before speaking to a university, it will be declined.)
If a student doesn't meet the grades for their Firm but they are offered an alternative course by that university, and they meet the grades for their Insurance and are accepted there, they are able to make a choice between the two. New course at firm Uni, or insurance course at insurance Uni. Again, another quirk of results day that is never spoken about!
Finally - if a student needs to ring a uni, pleeeease make them go old school and have a pen and paper at the ready (and their ucas ID!). So many hang up when trying to find their notepad on their phone!
15 years of being on the phone on results day and I could go on and on 🙃 Good luck to all the anxious parents!