Brilliant. That has worked perfectly. I am really grateful for you taking the time to think about this and mark up the drawing so clearly.
Thanks to others in the feed who also helped get clarity on the problem.
Simon
Thanks all. Hopefully i will try to answer your questions.
There were no short link wires.
The left hand switch in the diagram is a single face plate with two switches. One switch operates the outside light. The second switch operates the downstairs hall light.
The middle switch is a single...
Many thanks for your reply. I haven't changed the wiring into the other two switches. I unscrewed them took photos and then marked the attached plans. So the light switch to the left of the diagram in the hall is unchanged and the light switch to the right of the diagram on the landing is also...
Unfortunately when I was removing a light switch, two cables came loose, and I am unsure how to correctly re-wire them. I have attached two images. "Known" shows how the wires work at each light switch and shows the switch in the middle where I don't know how to reconnect it correctly.
The...