Whilst still in Division 2 A'Court's skill alerted England manager Walter Winterbottom, who was looking for a player to replace an injured Tom Finney; Winterbottom handed the left winger the first of his 5 caps on 6 November 1957 in a British Championship match against Northern Ireland at Wembley. A'Court's only goal for his country and a goal for Duncan Edwards were not enough to prevent England losing the game 3–2. The highlight of his career was representing England at the 1958 FIFA World Cup in Sweden, where he played in England's last three matches against Brazil (0–0), Austria (2–2), and the group stage play-off game against the USSR (0–1). He did this despite playing for a club in the Second Division.