We ran across this Ariel in a yard in Glen Cove NY this summer. What is interesting is how the owner dealt with the notorious keel voids. He simply faired in a garboard drain plug, which he left out during storage and inserted prior to launch. Unfortunately, no number plate was on her, and no owner available. But an interesting approach to keel water.
Dan (former #199 Ariel)
A suggested solution in the manual, but not such a large hole! :o