Hi Mike,
Thanks for the advise, that is a really useful list. We will be giving Grand Designs a wide berth haha!
I am doing the construction drawings now and incorporating a ludicrous amount of detail. There is a wealth of information out there for good practice passive house detailing but it certainly takes some time and brain power to gather, assess, adjust to suit and incorporate it into a real project. If I were sensible I would have an architect do this! We will get it checked by an architect to pick up my inevitable clangers though...
I think our biggest challenge (as you mention) will be working with the subcontractors to ensure that the details are understood and correctly implemented. They are mostly friends which will either make this easier or much much harder.
We are currently trying to select a window provider, I think The Green Building store are the front runners. Who did you use?
Cheers,
Jake