William Roy Piggott (18 July 1914 – 20 May 2008) was a student of Sir Edward Appleton who transferred a large group of German specialists from Austria into the British Zone of Occupation in Germany in 1945. He edited the still valid official booklet of reduction rules for ionospheric soundings with Karl Rawer and was engaged in international activities during the International Geophysical Year (IGY) and for a long time afterwards.