My word, the Streetmap site is awful.
It looks like it was designed in the 90s by a Computer Science student, the homepage just sits in the leftmost 50% of my browser with no attempt made to respond to screen size.
And then I searched for "Slough" and the first one offered is in Devon. Now I know it didn't ask to use my location data, but I'd hazard Slough, Berkshire is searched for more frequently than Slough, Devon. But even the Berkshire one is listed as "Slough, Slough - Large Town". Hardly intuitive.
The maps are nice, but it's a struggle getting there.