A bobbys error?

Here we go again, with another one of my usual farces occuring. This time it’s a VTEC Class 91 and Mk4 set involved. Having not noticed the correct route wasn’t set the train tried going down the wrong track. When I did notice instead of stopping, reversing and reselecting the correct road, I immediately hit the button for the line I wanted, resulting in this mishap!

What did we learn from this? Never make me signalman!