Manager Walter Winterbottom was duly impressed and Grierson made the squad - one of only three Scots selected.
Walter Scott | Sir Walter Scott | Walter Cronkite | Walter Raleigh | Walter Benjamin | Walter Mondale | Walter Matthau | Walter Gropius | Walter Hamma | Walter Savage Landor | Walter Burley Griffin | Walter Payton | Walter | Bruno Walter | Walter Winchell | Walter Crane | Walter Rilla | Walter Koenig | Walter Brennan | Walter Sickert | Walter Pidgeon | Walter Isaacson | Walter Damrosch | Walter Crickmer | Walter Brueggemann | Michael Winterbottom | Walter Reed | Walter Browne | Little Walter | Walter Runciman, 1st Viscount Runciman of Doxford |
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.
After retirement as a player he went to England for a one-year FA coaching course, where he was taught by the renowned Walter Winterbottom.
He did gain his one and only England cap in 1954, however, when Walter Winterbottom selected him to play in a British Home Championship match against Northern Ireland at Windsor Park, Belfast, goals from Johnny Haynes and Don Revie where enough the gain England a 2–0 win.