Tom
Cornish and Whitten have Hutchison down for new courses at Ashridge, Leeds Castle, Kington, Shoreham, Warsash, West Sussex and Gleneagles (Kings and Queens), all in combination with others mainly Campbell and Hotchkin with the exception being Braid at Gleneagles as you said.
Some extensive remodelling list as well including Ganton, Prines, Royal West Norfolk, Sundridge Park, Tadmarten Heath, Woodhall Spa, North Berwick, Pitlochry and Turnberry, although what exactly he might have dome on these courses is not mentioned.
Tm MacWood wrote a nice article on Hutchison, Campbell and Hotchkin for our SAGCA Golf Architecture magazine some years back now, and I can email that to you.
cheers Neil