Where I live I see both Red and Grey Squirrels. I probably see more Reds since I intentionally go to places where they occur. As an approximation, Greys are in urban areas and Reds in rural areas. In the countryside Greys can be, and are, trapped. Once in a trap it is illegal to then release them into the wild.
If, like me, you believe that Greys are a bad thing there’s no quick fix since Greys were introduced hundreds of years ago in less enlightened times and have multiplied so now there are far more Greys than Reds. For many people, Greys are all they will see. Here’s a picture of a Grey that stood his ground when I encountered him(?) on my walk
