Career
Whetnall was noted for his shot-making accuracy and tactical astuteness. Shortly after this, his tournament career suffered a 2½ year hiatus due to a badminton pro-tour venture which folded in 1973. Whetnall represented England in Thomas Cup (men"s international team) competition in the 1969–1970 and 1975–1976 campaigns.
He coached badminton in Kent for many years.