Pinged by Red Light Camera - Stopped over Line

I stopped late at traffic lights last night, my wheels stopping on the line and the front of my car protruding into a pedestrian crossing. When the lights went red, there were several flashes of light (indicating a red light camera trigger), and no one was crossing the intersection.

Is it likely I’m going to be fined, even though I never crossed the intersection? Could I be fined for not stopping before the line?

Worried about getting the fine, and whether I should accept or challenge it.