So funny! I'm planning to paint the bannister at the new house (TNH) black and am veering towards painting the treads and risers black too... I've been searching for images of black staircases on Houzz and putting them in my entrance hall ideabook. They are few and far between. In your case, I think, with your white walls, maybe the stairs white and the bannister black? (Assuming the white walls continue up the stair walls enabling the b/w contrast.) You've already put black firmly into the equation, adding some more may give more reason for the black rad cab. In my case, there is a very off-centre radiator that could so very easily have been directly opposite the front door in TNH which is rather annoying as it stuffs up the focal point. We are leaving here with every radiator covered with a cabinet - and going to TNH that has loads of radiators ...but no cabinets! Yes, the work ahead is daunting - especially since the area of Ireland we're going to is very basic and not full of DIY resources, etc. I keep thinking I'll paint TNH white - to make things simpler(!) But try as I may colour keeps wandering through my mind! Lovely to be in touch again!

I don't know the exact paper but search for faux grasscloth, here's one. It could also be a silk effect, can't really see it that well (!) but Andrew Martin does one in marl which is a light grey http://www.wallpaperdirect.com/products/Eijffinger/Grasscloth-Light-Grey/111907?gclid=COrh3IP0gcwCFeQp0wodWt0I3A

I'm in love with the blue and cream cushion but I can't find it anywhere! The pic was taken from a house being sold in London, perhaps 6 months back. Surely such a fab cushion is still available in the market. Please help me :)

Carolina is correct here with recommending a Victorian Floor Tile or Quarry tile. They do come in 100x100mm approx and are in a matt finish. Here is another option from Original Style https://www.originalstyle.com/victorian-floor-tiles/ If you require a sample please feel free to get in touch. Best Regards