So as the title says over the last couple of days I have started to notice a knocking noise from the front passenger wheel arch when I brake but only at slow speeds typically less than 10 mph. It only does it when the car is travelling forward and only seems to be after a period of driving when it's warmed up. When I gently brake the knocking sounds to be in time with the rotation of the wheels and doesn't happen going over bumps or potholes. Anybody had this issue before ??