Ran, below is a list of some of the courses designed or altered by the Hawtrees as per their website
http://www.hawtree.co.uk. I am actually a member of a Martin Hawtree designed course in the UK called Bearwood Lakes and have played a few Hawtree designs in Mallorca. Bearwood Lakes is not bad although they have not really used all the natural features of the land. As far as I can recall the Mallorca courses were not very memorable. I am not familiar with the other courses they designed. It seems they also did alterations at Birkdale, Portmarnock, Leven and Royal Mid Surrey.
Golf Courses designed and supervised:
Kings Norton Golf Club Birmingham, England 27 Holes
China Fleet Country Club Saltash, Cornwall, England 18 Holes
Royal Waterloo Golf Club Brussels, Belgium 18 Holes
Golf de Caen France 27 Holes
Golf de St Nom la Bretèche France 9 Holes
Golf des Baux de Provence Birmingham, England 27 Holes
Eerste Tilburg Golf Club Holland 9 Holes
Simons Golf Club Denmark 18 Holes
Bearwood Lakes Golf Club Berkshire, England 18 Holes
Golden Greens Golf & Country Club New Delhi, India 18 Holes
Sheraton Pine Cliffs Golf & Country Club Portugal 9 Holes
The Wellington Course Wynyard Club, Cleveland, England 18 Holes
Johannesburg Golf & Country Club South Africa 36 Holes
Royal Golf de Bendinat Mallorca 18 Holes
Golf de Pals Gerona, Spain 18 Holes
Djerba Golf Club Tunisia 27 Holes
Reems Creek Golf Club North Carolina, USA 18 Holes
Antalya Dunes International Golf Club Turkey 18 Holes
Reports and Alterations:
Royal Malta Golf Club Malta
Royal Mid-Surrey Golf Club England
Royal Birkdale Golf Club England
Golf de Fontainebleau Fontaineblau, France
Royal Golf du Hainault Brussels, Belgium
Portmarnock Golf Club Ireland
Vilamoura Old Course Portugal
Gothenburg Golf Club Sweden
Leven Links Scotland