His club team was
Harlequins. Willcox made his international debut on 11 February 1961 at
Lansdowne Road in the
Ireland vs
England match. Of the 19 matches he played for his national side he was on the winning side on 6 occasions. He played his final match for England on 21 March 1964 at
Murrayfield in the
Scotland vs
England match. He took part in the
1962 British Lions tour to South Africa, playing in three test matches. After he retired from playing, he was for many years the rugby coach and a teacher at
Ampleforth College. ==References==