Originally from a company called BMI Interiors these tiles have a crinkled silver/mirror back to them, with pale green glass on top and a smooth surface - very definitely mint or aqua in appearance when looking at them in person. Can anyone help us to find more of them? (The company I mentioned went into liquidation)

irugs.co.uk have a massive selection. Lots in the sale (which is a bit DFS neverending but anyway ...). I bought one in their sale 11"*6" for £70. Shipped from the US and no extra import costs either. Lots of geometrics in their 'modern' area.

Out of all the ones you’ve listed I like the one from Perch and Parrow but I’m confused when you say footprint within 48x48cm and this one is listed as 42x42cm. Incidentally I found them cheaper here: https://www.costco.co.uk/Furniture-Home/Dining-Room-Furniture/Chairs-Bar-Stools/Gallery-Palmer-Brown-Faux-Leather-Bar-Stool-2-Pack/p/263151 Also found this one: https://www.wayfair.co.uk/furniture/pdp/selsey-living-hoker-65cm-bar-stool-tcdv2652.html?piid= And a bit of a wild card but the cantilever might make it extra comfy: https://www.argos.co.uk/product/8835576 Also have a browse in the Houzz shop. They have lots of barstools so you may find something there.