This looks sooooo good, well done! Very satisfying thread to follow aha! Was putting the barn door difficult? I plan on doing it but I have limited DIY knowledge!

Re-did fly around model to correctly show rear decking and landscape idea, We have are about to start ground works

Wow! Love everything you have done. Kudos to the demolition of extra bedroom in order to reclaim the outdoors. Great job.

Working with OKL dimensions, by walling off the existing kitchen by filling in between the end walls and adding extra from the dining if wanting a longer kitchen the following could work. Adding a door between the kitchen and dining (which I haven't shown) would give parents their own space leaving the large family and kitchen to the kids. I have added a small area at the end of the kitchen to be able to close off the bedrooms all except one, this could be storage, desk, etc.