I forgot to mention the black car (I think it was an SE) I saw in south Edinburgh about ten days ago. 23rd February, it must have been, around 2.15 to 2.30. It was travelling south on the A702, somewhere around the Buckstone area.
I was driving north, and idly ticking off green-striped number-plates in my head as I watched the cars coming towards me. At first I didn't realise it was an MG4 because the black was so unobtrusive (it might even have been a dark grey) and when I did clock it, there was no time to flash or wave. I don't know if the driver noticed me or not, other than thinking, the blue ones are a bit obvious!