You drive an enormous articulated lorry through a very busy road. That's not why I reported you.
Last time I saw you you waved and smiled when I got to the front of the traffic queue. That's not why I reported you.
You once stuck your head out of the window of your cab to check I hadn't come down your left-hand-side before proceeding. That's not why I reported you.
When I was in front of you you waited a full five seconds after the lights changed before starting to move so that I could get safely ahead. That's not why I reported you.
You are consistently nice to me as a cyclist and take an interest in protecting me because you know your blind spots are considerable and you don't want to injure me. That's why I rang the company you deliver for and told them you're fabulous.
They've even emailed me back thanking me for emailing and said they'll pass on the message.