Thanks everyone.
To Stuart_R - thanks, great stuff! . Is this a more efficient way to selecting two nodes and clicking delete?
or is it the same thing.
To Jer - Yes the line was created by a new path and I didn't realise. As you said, when you click on two nodes to eliminate a line it warps whatever is connected to it.
so it is possible to isolate a line and delete it regardless of how everything is connected.
If I drew a flower and the line forming the stem is also connected to all the petals (same path) - I am able to isolate the stem between two nodes and delete it without warping the petals or having to rectify the shapes.
If I have an intricate drawing and wish to remove a line in a tricky area is what I am trying to learn.
Sorry if I am repeating myself, I've been winging it on Affinity.
I'll try and put all this to practice, must have a proper look at the tool bar.
:)