Hi, the flooring is vinyl, I don't know the manufacturer or name I'm afraid. My local carpet fitter had various books to choose from, I think it cost around £150 total.

Is the tile on the right a deep green? I would look at something taupe (which means it has a red/violet bias) along the Iines of Skimming Stone or Elephants Breath (Farrow and Ball). These colours seem to complement deep greens whereas anything with a yellow tinge could look a bit sickly. Also worth looking at Little Greene Slate which comes in oil based paint. Or, do you want to actually match a colour to the tile?

I think t&g would work as you often see in attics however I'm guessing that's not the style you want. If you want georgian style panelling I think you need to follow the shape of the wall for panels, I've attached (a badly drawn) picture but hopefully you get the gist.

I’ve had them for four years and love them.