Received conditional offer but could I defer for a year?

Hello, I have received a Conditional Offer for Social Work at University of Gloucestershire to start in September and I'm so delighted but am worried I may need to defer for a year. It's not certain yet but was wondering of the possibly just in case I needed to. I've done a bit of research and read somewhere that a university (not sure which one and not sure if true!) withdrew someone because they asked about deferring and the university took it as if the applicant was unprepared or something. This of course makes me worry as i am incredibly determined to study at this university!

Would I be allowed to defer or would I have to reapply fresh for next year? If so, what is the deadline for me to do this? Would my offer be withdrawn?

Thank you!