This is a helpful podcast if you are thinking about what size of kitchen island you want or what to go for: https://shows.acast.com/love-your-kitchen/episodes/exploring-function-over-aesthetics-with-amnda-hughes

Love your kitchen, you’ve done a great job, not only does the kitchen look good, it’s totally practical, drawers are the way forward, even if they are more expensive than cupboards. I’ve just redone a kitchen in a house we rent out, the old one was finally falling apart. I was going to go to Howdens and use the joiner etc we knew, but in the end we used a small local company, which cost us £300 more, but the quality of their interior cabinets and doors was so outstanding, plus they could do everything, including tiling, we went with them. We didn’t change the floor, but did everything necessary, I’m hoping it lasts well and our tenants look after it!

With pine green cabinets and white worktops, there are several colours for the kitchen floor and wall that would complement the colour scheme nicely. Here are some ideas: Neutral colours: Since pine green and white are both strong colors, you may want to consider using neutral shades for your walls and flooring. Colors like beige, cream, or light grey can work well to balance out the stronger colors in the room. Lighter shades of green: Another option is to use lighter shades of green for your walls or flooring to create a cohesive look. A pale sage or mint green could be a good choice, as they complement pine green nicely without overpowering it. Warm colours: If you want to add some warmth to the room, consider using warm colors like terra cotta, mustard yellow, or burnt orange. These colors can add some depth to the room and complement the pine green nicely. Cool colours: On the other hand,cool colours like navy blue, teal, or slate gray can create a calming atmosphere and complement the pine green as well. Ultimately, the choice of color will depend on your personal style and preference. It may be helpful to gather some samples and experiment with different combinations to find the perfect look for your pine green and white kitchen

once you draw it to scale and position the kitchen and island there isn't enough space for a sitting area ( where you have dining) also it would be too tight to have the sitting area where the kitchen is on the plans. you need walking round space and you would have to have a sofa that is max 2,5 m wide and it would still feel a bit tight. I have actually tested it. Since a first glance yes the idea of a kitchen island looks good. But when you put everything in, you see that it just doesn't work well. I used to be a kitchen designer back in the day and I always hated that most designers didn't consider all elements of the space and how everything works together, but only cared that the kitchen is as big as possible since they get paid commission on the % of the price. Just in case if the kitchen designer was trying to convince you to have the kitchen there with big island. you could have a peninsula if you wanted I don't see an issue with that. If you want send me a DM and I can schedule a complementary 30 min zoom and show you in 3d what do I mean.