I wasn't planning to paint the floor, just going to order enough of these to cover the whole thing (I make it about 7 of them with a bit left over)
https://www.arkmat.co.uk/gym-mats/1...gym-mat/12mm-smooth-black-rubber-gym-mat.html
I went with the 18mm Easy Pro Gym flooring, damn heavy duty but very pleased with them, best way to cut is fresh stanley blade.