Thanks for the info, I'll check it out. I've also been in touch with Richard Oliver Design (ropd.com) and johnlsayers.com
Hopefully they can advise me. There are no specialist studio architects in my country (that I can find), so I will have to get my architect to send the building schematics etc to the studio designer so they can design it on paper and send it back to my architect... who will then project manage the contractors... complicated, it all depends on the budget and costs.
Thanks again.