I do maths and I must say as much as I hate physics, it has helped me with my maths. I was able to learn equations very well since I use the same equations in both physics and maths. Physics has also helped to me with forces and motion in maths. However, I find biology easier than physics because it’s one of those subjects that if you learn the content you would normally get result you want. Physics is a big jump from gcse, its more bout application and just learning the content would not get the best grade.
It all depends on ur interest.
Hope this helps