Park, equalising Tommy Lawton's opening goal. He gained several more wartime caps. He gained his first full cap against Switzerland scoring twice in a 3–1 win at Hampden Park on 15 May 1946 At international level, Liddell played predominantly as an outside left, in competition with Scotland-based Lawrie Reilly and Willie Ormond. The Scottish Football Association (SFA) denied Liddell and his teammates the opportunity to participate in the 1950 World Cup, hosted by Brazil, because of an earlier decision not to sanction involvement as British Home Championship runners-up. The decision meant qualification depended on the final match against England on 25 May 1950, which Scotland lost 1-0 when joint-first needed only a draw. Despite pressure from players, the SFA maintained its position. In 1951, Scotland won the Home Championship, with Liddell scoring twice. His goal against England in a 3–2 win followed a clash of heads with Wilf Mannion that fractured the English player's cheek bone.Video of the match and collision, Pathe, britishpathe.com. Retrieved 22 August 2010 For the 1954 World Cup, the SFA decided to authorise World Cup participation regardless of placement. After a 3–3 draw with Wales, the SFA omitted Liddell from the starting lineup and he did not accompany the team to Switzerland. Scotland struggled in the World Cup and lost their two matches 1–0 and 7–0 to Austria and Uruguay, respectively. The team's first manager, Andy Beattie, resigned in protest because of SFA interference in the selection process. Having been overlooked for four matches that followed, Liddell was re-called by the SFA after a 7–2 loss to England at Wembley. He returned as an outside left and scored one of Scotland's three goals against Portugal on 4 May 1955. His involvement in the tour of Yugoslavia, Austria and Hungary later in the month proved eventful. In a 2–2 draw with Yugoslavia, Liddell received a black eye when accidentally punched by goalkeeper Vladimir Beara while attempting a header. He scored his last goal for Scotland in an ill-tempered 4–1 win over Austria at Praterstadion, where a brief pitch invasion involving large numbers of supporters reportedly resulted in altercations between players and fans.Video of Scotland v Austria, Pathe, britishpathe.com. Retrieved 22 August 2010. Late in the match against Hungary, Liddell missed his second penalty for Scotland while the side were losing 3–1 to the "Golden Team". During his career with Liverpool, Liddell converted 34 of his 41 penalties.