How do I bathroom / kitchen / extension? etc.

looks great, but eye level ovens are much nicer to use IMO

also, i'd never go back to under counter cupboards after having drawers. being able to pull a full depth drawer out is so much better

On the high ovens you could always have the ovens/microwaves in the cupboard between the doors. Or is that the fridge?

I'm not as sold on an island as others. They're great for big kitchens, but I feel lots of people shoe horn them in for fashion over function.

How I'm reading this room is that you're having a kitchen down one side and a dining room in the rest with the slimline cabinets for life storage.

On the drawer cupboards I think a combo is good. For herbs a shallow draw is life changing. I stayed somewhere that had one and it was amazing.

What about going into a Howdens and getting a design?

Seems inefficient. I vote for a U shape counter and bench seat.

Where are your zones - prep, cook, clean, tea - how much do they overlap and where will people be when they are in the kitchen doing things.

That corner could end up being where all the things happen.