The second tournament played since the hiatus of the First World War, the 1921 competition was dominated by Scotland, who won the first of seven championships they would claim throughout the decade.

England and reigning champions Wales came joint second as goal difference was not at this stage used to separate teams.

Action resumed the following February when Scotland beat current champions Wales at home and then Ireland away, to top the table.

Wales and England both needed victory in their match to have a chance of catching Scotland, but both sides nullified each other and the result was a scoreless draw, requiring an English victory over the Scots in their final game to beat Scotland's lead.

In the final games played simultaneously on 9 April, Wales beat Ireland to elevate themselves into joint second place as England crashed 3–0 to a superior Scottish side in Glasgow, thus making Scotland British Champions.