London Grey

It sounds like you’re referring to a specific type of flooring, “London Grey,” possibly from a product line named “Showfloor.”
Product specification
Product Name: London Grey
Plank Size: 14/3.2 x 190 x 1800
Plank per box: 5
Qty per box: 18.41
Specifications: Oak Flooring, 3 layer Click profile, UV Lacquer