Before revision: Year Category 1 Category 2 1964 George Burden Stratton Lord Hurcomb 1965 David Attenborough 1966 Aubrey Buxton 1968 James Fisher 1969 F A P Stengelhofen 1973 A J E Cave & Eirwen M Owen & L G Goodwin 1974 Eric Hosking 1975 Gerald H Thompson 1983 Stephen Jay Gould 1984 E H Ashton 1985 L
After revision: .Year Category 1 Category 2 1964 George Burden Stratton Lord Hurcomb 1965 David Attenborough 1966 Aubrey Buxton 1968 James Fisher 1969 F A P Stengelhofen 1973 A J E Cave & Eirwen M Owen & L G Goodwin 1974 Eric Hosking 1975 Gerald H Thompson 1983 Stephen Jay Gould 1984 E H Ashton 1985 L