Thank you so so much everyone! Been out all day and have come back and been reading with great interest.
SpnBaby1967 yes, that's my worry with having a white floor but with colour or marbling - is it clean/isn't it clean. I will look that program up, thank you!
RuggeryBuggery you're right and i have learned this a) MILs new floor has done this and b) my own struggle in the downstairs loo. White grouting, white tile = stress.
cheeseychovolate
yep, see above.
Cherrysoup interesting about the textured laminate trouble. Maybe a better quality laminate (Amtico) is quite highly textured? Ours which we have through the downstairs is more ... affordable (B&Q) and is only lightly textured and easy to mop.
Hazel444 do you know i've never once considered a pattered floor tile
You don't see them very often in kitchen inspiration pictures at the moment either. A trend in waiting perhaps? Thank you for a fresh idea :)
safariboot made me laugh. Black marble - dirt/hair/bits/paint specks or the marble itself!? Yes, i can picture that 
@Time40 once a week moping would be ok with me. Bit i'm starting to think i will regret it if it still doesn't look clean even then. The posh description -
Yes some of the things you hear yourself come out with when you're choosing a kitchen begger belief! Today i heard myself say to SIL that the Cararra marble would just clash terribly if the majority of woodwork is in soft pebble
Christ let this all be over soon 
@Seasidemumma77
Awful! This has made me think maybe not to the (B&Q) laminate going into the then ...
@humansare is there any possibility you could come and live with me for the next couple of months? Your thoughts and ideas are brilliant! And then move in with SIL - she needs kitchen help after me. Copper handles to go with copper veins. Yes ...... rubs chin. And the rainbow speckle white - love it! I have done a wall of our downstairs loo in subtle rainbow speckle on white shower wall (with gloss white tiled floor) It glitters gently in the sun and makes a surprising happy break from the serious period Georgian tastefulness of the rest of downstairs 
GillBiggeloesHair bet it looks lovely when it's all clean. But that's a lot of white floor!
DinosApple oooh you have my kitchen!?
I will bare that in mind about the staining. They say quartz wont stain but i'm using my samples as coasters at the mo to test that theory with coffee tea blackcurrent ect ...
longwayoff you're bang on the money. I love a show home look but get very stressed knocking myself out trying to keep it that way. stupid really.
thelegohooverer never thought about the worktop and plates. I DID know about butler sinks (ceramic) and being careful with glasses (grew up with butler sink) ... which is why i want a normal stainless steel one. Love the idea of dirt coloured laminate 
StarlightLady that's a good tip. Leftovers from tile supplier. Thank you. Are yours a plain white? Square? Gloss?
@Makingnumber2 that made me smile. We have white cats which shed so a black floor wouldn't do for us either. DH is dark, i'm blond - you're right - what floor?!?!? What really doesn't show dirt anyway? Anything extreme light or dark i guess ... And the cold, yes. My new downstairs loo glossy floor is bloody FREEZING on bare feet.
Herhereherhere I have been sent a sample of a stone effect porcelain tile. It is matte and has texture like you describe. I am wondering if it might not show the dirt and might not be too cold ... ? Those calacatta floor tiles are gorgeous - but we have to buy 22 sq ft and DH has asked me to try to keep the price down to £10 per sq ft - HARD!
Woodpecker22 yep agreed.
@BBCK paving stone effect sounds lovely. Were they expensive? Could you give a link?
redcandlelight so many are saying the same about the high gloss. And yes to stone worktops being tricky with oven cleaner/limescale remover ect.
SIHastingsLiketheBattle DIY has the blue/grey? I will check it out! Thanks.
Moresleepandwine that tile is divine!!! It's what i would have in a heart beat to be honest. But we need so much of it (22sqft) that anything much over a tenner per squ ft is too much for us. But thank you. I love that ...
GreeboIsMySpiritAnimal my tall corner pantry/larder/cupboard is one of my non-compromise bits of the new kitchen 
turkeyboots white hall? Eek!!