Are those "sections" you're referring to the actual Collections? If yes this is already built-in:
yourdomain.com/collections/all should get you to that page, let me know if that's what you need!
Thanks for the reply, and that solution would work however I missed a key point out.
I have 2 sets of 'collections' for my store. One section where I have trade items and one section where I have retail items. If I did that, I'd have trade and retail items all on display which I don't want. I should have mentioned that before!