Tom,
Martin Hawtree is the architect, but there has been an ongoing process of tree removal on the New Course, as well as more heather being planted. The 18th of the New is being changed quite a lot (the entrance to the green has been narrowed considerably), as is the 3rd of the Old (again narrowing the entrance to the green). There is a lot of work being done to the bunkers on both courses.
Edit: To give you an idea, the trees to the left of No. 5 New have been cleared, as have the majority to the right of No. 6 New. The hill between 6, 7 and 8 New has had a lot of trees removed, the main trouble now on 7 off the tee when you go left is heather. Trees to the right of 8 new have been cleared, enabling recovery shots from there, with plentiful heather now bordering the right hand side of the fairway. Seeing the pics actually reminds me how much it's changed recently!