He his-self,
When you have got the 'topic list' opened eg. Talking Point, when you want to open an individual thread eg. Navigating FWi website, try using the right mouse button then selecting 'open in new window' from the list of options which then appears. That way you can have as many 'topic lists' and threads open as you want all at the same time. You can even have the same thread open in two windows so that you can read other previous posts while you are composing a reply.
Of course you can also use this option in any website to make it easier to navigate, including DEFRA or in your case more likely Scottish Government!