Steering shaking when braking

I’ve got a slight issue with my brakes. When I brake at high speeds such as on a motorway or dual carriageway (50+ mph) my steering wheel shakes quite a bit. The higher the speed the more it shakes. But my pads and discs are fairly new, they’re definitely less than a year old so I’m not sure what could be causing this. I’ve Googled the issue and many are saying the discs might be warped? Any idea as to how I could solve this issue? Thank you