So . . . Dorota (bot) offered me a train to Sosnowiec (bot) on track 2, which I accepted. (This is a first for me)
I tried to set a route from Signal B on track 2 towards Sosnowiec via track 1, by dropping the barriers and setting points 7/8 to cross from track 2 to track 1 - which I was able to do.
However, the inbound signal at B would not clear, would not give me the route.
What button sequence am I missing?