Thanks Basara, I appreciate you taking the time to reply!
I can try this over the weekend, there are currently 12 categories, and I dont expect them to increase much at least for now. My concern with this option, though interested to explore it anyway (thanks), is the person that regularly manages the site has '0' technical knowledge, so the optimum solution would be an automated one.
I'm aware that you may not have tried the 'Category Wall' extension I mentioned. Although theres no comments/reviews, for that product, perhaps as its a fairly new extension. Based on my requirements I detailed, could you tell me if you think this would be a suitable option looking at that product specification and are there any other options that would be more automated and very simple to manage once set up.