I can't think why leather floors would be a good idea, so i read up on it and found this interesting article. It seems, that as you would expect, you are up the S*** Creek without a paddle as they say as soon as you scrape them, scratch them or spill anything on them. Therefore, unless you covered the whole lot in boat varnish, supposing it would stick in the first place and change the durability, they aren't a good idea. Leather Flooring I'd stick to engineered flooring with sound board underneath x

Hi, If you are wanting wood effect without taking extra care or maintenance then wood effect porcelain tiles or Amtico is the way to go. Porcelain tiles are highly durable and if you get a quality tile, it does resemble wood. However, if there's no UFH, it is quite cold to walk on. Amtico or Luxury Vinyl Tiles as they are called are more warmer to the touch, and if laid properly on water resistant and highly durable. We were informed that the durability of the likes of Amtico, can be compared to supermarket flooring which gains high amounts of traffic, yet remains in good condition. You also get wood effect with LVT and can resemble real wood when laid, without the extra care or maintenance. Another alternative is karndean which is cheaper than amtico Good luck

The sample I received 2 photos of the same sample in showroom

You should listen to the supplier of the flooring. If they say no glue, then no glue. A floating floor shouldn’t need it. Presumably it’s a click fit?