Thank you all so much for taking the time and the trouble to give me your ideas! They are really helpful. I'll be sitting down later on with a glass of wine and seeing what I can move around!
Interesting split on the hob location! The main thing determining this for me is the extractor - because of the open plan layout (and my terrible cooking skills, buuuuuuuurn), we need a pretty heavy duty extractor and it needs to remove the dirty air to the outside. I don't want to have an extractor over the island because it will interfere with the view out of a large window in the next room. I've spent ages and ages finding lighting etc that allows me to have a totally smooth ceiling under strict instructions from the architect!! There is an extractor that sits in the work surface, but I don't know how effective this is and it's also £££.
I have obsessively mapped everything I own, down to teaspoons, to drawers. There are quite a lot of hidden/internal drawers in the cupboards!! I have a separate utility room with a bit of extra cupboard space too.
bitofa - the units and appliances are around £5k. Bear in mind that this includes a load of internal drawers, filler pieces, cover panels and an expensive sink etc. along with two ovens and a hob. You could do the same thing for a lot less without that stuff. The quartz worktops are an eye-watering £2.5k on top of that; it would be much cheaper to have laminate but I have fallen in love with them and am refusing to budge.
nome - Yes, we are definitely having an upstand. The kitchen floor is 1 metre higher than the floor of the next room, so anything that fell off the island would cause some serious damage by the time it clunked someone on the head the other side! I actually had to explain that to the architect, who thought we could just have hot pans and trays with nothing to stop them being pushed over.