Another vote for Dekton and Sileston Quartz worktops, use them all the time in our projects as so much more forgiving and low maintenance than granite or marble. Agree that Corian is a good option if you have a large island to prevent visible joins, whilst it has other benefits you do need to be very careful when it comes to heat. Vast range of colours and textures in all types nowadays so the type of material shouldn't limit the effect you want to achieve - be that traditional or contemporary. I am always a big advocate that a worktop is an investment, there is no point spending a large sum on a beautiful quality kitchen and then finishing it off with a worktop that won't stand up to time as well as the rest of the room or cheapen the look - I always recommend to go for the best you can afford.

We supply all sorts of kitchen worktops but I’d never heard of them. Had to Google it. Wouldn’t like to be measuring my own worktops TBH just in case there’s a slight error. Don’t they send a person out to electronically measure them?

That’s a valid concern! It’s definitely a fine line with matte finishes since they can get too shiny if you're not careful. The ultra-fine Scotch-Brite pad is designed to be much gentler than something like a regular scourer, though, so it won’t have that same polishing effect. The key with soapy water is to keep the pressure light and work in small, controlled circle it's like "softening" the pad's effect while making sure it’s not too aggressive on the surface.

You could consider an insurance claim. Ideally to fit the new worktop the splashbacks need to be removed, this will probably damage the walls so its quite a big job. You may find a fitter who is prepared to work with the splashbacks in place, but the sink run would have to be cut short to fit in between the splashbacks and then the gap filled with silicon. How to get the worktop in position may also mean removing some wall units as well. then for the 2 side worktops being able to slide under the splashback and making a decent job of the masons mitre, keeping an even overhang to the doors etc, not a job i would of undertaken when i was fitting. You mention water resistant laminate, if you mean compact laminate, the max thickness is 20mm so there'll be a gap. If you mean laminate but made with 'green' chipboard, it still needs sealing and if its constantly subjected to moisture it will still blow. I'd suggest a new worktop in a stone/abstact pattern colour as you have a modern door style, make sure it's a bullnose and not these edged worktops [i've seen these fail around sink area], get rid of the splashbacks and fit some metro tiles in a brick pattern, also get rid of the windowsill so that is also tiled instead of that gap you have under the sill. Reason for tiling is that if the splashbacks have been stuck on with silicon, even if the wall isn't damaged any silicon may affect the new paint. For the sink, you mention that you want to wash oven trays, so for a bigger bowl opt for a single bowl with a right hand draining board as well, looks like its a 600 sink base in the pics so there's plenty of choice, personnally i'd have a 1.5 bowl though as Betty says, also opt for a composite/granite [as below] so you can just drop the sink in place on a bed of silicon beading, stainless steel would ideally need the clips underneath [there are a few push in stainless sinks though with spring clips].