Is it possible to pursue a degree in physics without studying maths advanced level but having taken physics? If not, would an AS in maths be sufficient? I plan on taking biology and sociology alongside physics.
Yes, if you don't mind paying for and doing a foundation year. Some universities offer physics courses with foundation years where they practically teach you A-Level maths in that year to fill in for what you missed. (Alongside A-Level Physics, but that would just be revision for you)
I'd definitely recommend checking with whatever your plans are for after! You said a degree, so probably best to check some uni requirements on their sites to confirm this or even to contact them. I know a fair few do require A Level maths for physics degrees, but i'm sure there are places that don't as well