[1] In the subsequent Boys Amateur Championship he reached the quarter-finals before losing at the 19th hole to the eventual winner, Neville Dunn.

[5] He won the French International Boys Championship in 1955, beating Niels Thygesen 6 & 5 in the final.

[6] In early 1957 he became the youngest winner of President's Putter, beating Gerald Micklem 3 & 2 in the final.

As well as playing for England, he represented the British Isles against the Rest of Europe in 1956, 1958 and 1960, a match that later became the St Andrews Trophy, and for Great Britain & Ireland against the United States in the Walker Cup in 1957 and 1959.

In the 1957 Walker Cup he played with Guy Wolstenholme in the foursomes, halving his match, but was not selected for the singles.

[8][9] Shepperson was runner-up in the 1958 Brabazon Trophy at Royal Birkdale, 3 strokes behind Arthur Perowne.