asked for proof of gcse english results on offer

i have applied to uni and one of my unis request proof of english gcse even though i did write them all down in my application, when i go on ucas and press offer it says i should upload proof of my english gcse on the student portal however i dont have my gcse certificates..
should they ask me for my gcses anyway? not sure what to do

If it forms part of their entry requirements, they can ask for proof. Did you lose your GCSE certificates or did you never get them in the first place?

i never collected them in the first place but i do have a sheet that has my results on it. my offer has also been confirmed already but on ucas the conditions of the offer is that i need to upload my english gcse? do i need to since ive already included them into my application and also i dont think my school has them anymore.