I do like the idea of white stools, if you fancy painting the stools. I would personally paint the walls white and hang some bright coloured art (maybe with some yellow accents) - it will brighten the area. If you don't want to spend too much on the paint, either browse through the discounted section in B&Q and homebase, or buy cheap white paint (£4.00 for 5L homebase brand) and mix part of it with a paint tester of your choice for off white shade (like white + beige for lovely warm light shade of roman stone) - you're lucky to have such a lovely and well lit kitchen!

I like both, depending on their use. For sociability, the swivel are great. For writing or some other, more 'stationary' function, the stationary are it. The swivel is too much work to keep it stationary!

If you want the seats to swing out from the island be sure to check that the island is substantial enough to take the load, also that the island is well anchored to the floor. If you consider the arm is for example 2 feet long, then sitting on the extende seat will be the same as applying your full weight to a crowbar, two people sitting on one side would destroy a normally constructed island. Similarly, if fitted to a wall make sure that they are anchored well and that the wall structure is suitable. A nice idea to save space though

i think maybe some with some gold or metal legs might look nice maybe add a bit of something different to the room, even some navy ones would look nice i think like the ones ive linked below https://www.clipopuk.com/products/christie-bar-stools-set-of-2?currency=GBP&variant=42817443037396&utm_medium=cpc&utm_source=google&utm_campaign=Google%20Shopping&stkn=43291dee25b0&gclid=CjwKCAjw38SoBhB6EiwA8EQVLmTGZeBshkrcJ60VY0LrcI1W6NkS1kwEKHVDcVBPafD-GukGdw2WgRoCW3sQAvD_BwE