Red light camera trivia

[FG50T]

Hi guys and girls, had some my picture taken today ()

I was stopped at a red light light with a red light camera. Single lane going straight and one lane turning left. I was sitting in the straight lane and I thought that I'd like to turn left. The left arrow went green looked around, not a single car on the road behind me. Put my indicator on and hooked my wheel fully to the left and rolled on left! Bang! Flash! I'm curious as it was only one and I've seen a lot of people drive through red light cameras and they flash twice. Did it realise I didn't go through the intersection but triggered the sensor?

Now before all the road going do-gooders jump on my back for breaking the law and changing lanes in an intersection. I didn't think I had? I could see the line in front of my bonnet when I began to turn so I'm hoping someone can share some knowledge for me. I'm not worried about the points. I've lost 3 in my life and that was in 2007, it's just the dollars.