Rats and mice are ridiculously common in central Glasgow, its plagued the city for years to the point many argue its a public health crisis. While sure the suburbs might be better, I've never once seen someone describe Glasgow and rats being uncommon in the same sentence. I literally can't visit Glasgow without seeing an enormous rat in the street 5 minutes after arriving.
There are loads of nice things I will say about Glasgow - I lived there for decades. Being low on the rat count is not one of them. The local politicians constantly talk about the rat plague too.