Hi Irina! That's a really lovely kitchen, I think perhaps using a natural material with variation will be an excellent finishing touch...have a look at our New York Brick tiles, we keep these in stock in West London can send a sample if you think these could work http://www.stoneandceramicwarehouse.co.uk/wall-tiles/floors/item/new-york-bricks

For me the most important thing was how it would "go" with the rest of the kitchen. Also, as I planned the kitchen, I needed to understand how and how well, the splash back would intersect with the extractor, the wall units and the worktop upstand. FWIW I would never have had a printed glass splash back, although we did consider a plain white one. But the style of the extractor meant the splash back needed to be shaped around the extractor unit - not so easy with pre-made glass splash back. My biggest turn off with websites is bad grammar and spelling mistakes. I feel that if a company cannot be bothered to check something as important (and often the first interaction the company has with potential customers) then I would question how careless they would be with my order. I also hate pop ups and distraction on a page. For instance - and I hope you don't mind me commenting on your website - having the phrase "package deals available!" at the top of most product pages is a distraction for someone just looking for a splash back. It looks like it's a trade only thing and it looks a bit down market and a bit Trotters Independent Traders'ish. Perhaps combo offers may be better mentioned on a separate page of "offers" or a small section in the product information that combination/bundle deals of a splash back and worktop are available.

Ha! Excellent :) sorry but I can’t remember the name and it was the only light grey they had (probably for better as the more choice there is the more diffi it is to make a decision:-)). I recommend you get samples/shop brings bigger samples to put against wall to help you decide. I found this great to test and look at it woth different light etc. I got it as it is glass so it’s low maintenance and since I had it installed I haven’t properly cleaned it haha apart from minor dots from tomato sauce and I just wiped with sponge. Love the practical side ;)!

If you include a 100mm upstand you will still have a gap if its 660mm and the alusplash is only 610mm wide. You could make it look deliberate by stopping under the units and having the gap of 50mm. I wouldn't do the upstand and then the alusplash its not sleek. If you do the alusplash start at the worktop and have the gap above. That could be the starting point for the shelf. Metro tiles are fussy to clean and unless white on white can look very busy. Zellige tiles are stunning but for that square meterage probably eye wateringly expensive. I would do a serious houzz search of what you are planning in photos, save lots to ideabooks and then see which style appeals to you the most to help you decide. If you have the upstand I wouldn't do any splashback above it. It looks great with only a good wallcolour.