Having previously sourced the 12mm ply floor next it’s time to get/fit the covering. I did quite a bit of Googling and decided on using some Altro Xpresslay which I purchased from Contract Flooring. This particular version of Altro doesn’t need gluing down, just using the double-sided tape they provided. This is the colour I went for.
I used the plywood floor as the template (remembering to have both the floor & covering inverted!).