Will the uni accept me on results day?

Hi, I need some advice based on my specific situation.

I applied to Uni for BEng Electrical and Electronic Engineering. I’m studying the BTEC Level 3 RQF Extended Diploma in Applied Science, predicted D*DD, and I self-studied A Level Maths as a private candidate (no predicted grade submitted). I also already have an A in Core Maths.

My offer is: DDD in BTEC + B in A Level Maths.

Now here’s the key part: In my offer letter, they wrote that my offer was made in line with their contextual admissions policy, even though the grades weren’t lowered since the offer they gave me was already shown on their website as the standard

I’m worried I might end up getting up getting D*DD + C in A Level Maths( the maths is what I’m worried about).