Royal Ashdown is probably no more than 30 miles south of London. A few miles further south, near Uckfield, is Piltdown, another bunkerless course worthy of a visit. There is another fine bunkerless course at Berkhamsted about 20 miles north west of London. Annually, it hosts the Berkhamsted Trophy, one of the high spots of the amateur golf calendar. always attracting a high class field. I can think of several other British courses without sand bunkers, but they are not quite at this level.
You may like to make up an eclectic course consisting entirely of bunkerless holes. Here are a few classics from the British Isles to set the ball rolling:
1st Royal Liverpool, 4th Rye, 5th Royal Worlington, 7th Royal Ashdown, 11th Ballybunion Old, 17th Wentworth West.
Mark Rowlinson.