Where - Why - What

Where did it come from?
Why was it left there?
What will happen to it now?
I was taking a short cut to St. Enoch Square and spotted this trolley very bright in a dingy lane and I was attracted by the contrast. A Blip that early in the morning was a bonus. Round the next corner three fire brigades in a row in Buchanan Street and immediately thought of the saying you wait ages on a bus and three come along at the same time another Blip however the trolley won. Hope you like it.