Until today I had never actually seen one of the solitary bees, at least not consciously.

Today I saw something with a gingery front half and a shiny dark back half, with faint lighter markings. I identified it as a solitary bee, Andrena Nitida. But when I read further I found it doesn't occur north of Yorkshire, and I'm in the south of Scotland. I have heard that the range of many bees is gradually moving north, so I'm wondering if this little beauty has done so too.
Does anyone know how I can find out? I didn't have a camera on me (inevitably) so have no positive proof that my ID is correct.