Please have a look at the DfE created Guide to Post-16 Results 2020. A useful resource to look at ahead of results day. It explains the process nicely and may answer any queries you have.

https://www.gov.uk/government/publications/student-guide-to-post-16-qualification-results-summer-2020

https://www.annafreud.org/media/12101/final-selfcaresummer-secondary.pdf