Oh excellent, thank you, it looks lovely! I have been to many of the suppliers but QQ is too far away for me with a screaming baby in the car and they won't mail me samples! Once I choose a stone mason I will view them in person because I hear even with Quartz each slab can be a little different. I was thinking maybe Lexicon quarter...warmed up a bit...but I'm not sure. Thanks for the warning, I do have time on my side so I might go get some sample pots and see what actually looks ok with our lighting.

Thank you everyone for your comments. I have decided to go with a white stone, most likely Caesarstone Intense White, but will be visiting the various stone showrooms over the next week or so to look at other whites (in light of the comments about the starkness of the white options I posted). Looking at a crisp white with a little movement that doesn't clash with the floor and texture of oak panels. Thanks again! :)

Hi, Ali, I eventually went ahead and had the stone overlay on my kitchen benches and splashback. I am absolutely delighted with the result, and am so pleased I had it done. It has given a completely refurbished look to the kitchen; there was no collateral damage to the cupboards; no having to take the old tiles down from the existing splashback; I didn't change my cooktop or sink (just had the same ones put back in) and I couldn't be happier. The only benchtop which was completely replaced was the long one at the front. It was widened to make a breakfast bar. My previous benchtops were a dark mottled laminate and the splashback was cream subway tiles with a frieze. Very dated. I've attached a before and after photo (the timber venetians at the window have since been replaced with a white holland blind, which looks so much better. If you're in Sydney I can give you the name of the company that did it for me.

Hi Agnes, the photo you have posted above on top looks like the gap is between the "floor" and a "Waterfall-End bench" based on what looks like an Architrave and chair legs in the background on what looks like a concrete floor; hence the two replies mentioning your floor, but you have said it is coming away from the "wall". I think the photo may have a deceiving perspective and this may not be a sub-floor problem, can you please post another photo showing the gap from further away showing more of the kitchen too in the context of where it is so we can get a better idea of what has happened.