In 1950, Muirhead formed the Scottish National Congress, a direct action group focused on campaigning for Scottish Home Rule. While remaining a leading member of the SNP, he devoted most of his time to the new group and, ultimately, the production of a proposed Scottish constitution.[2]
He died in 1964 and was buried at his home town of Lochwinnoch. In 1968 a plaque was unveiled at his former home in commemoration.[3]
Tom Johnston MP, a lifelong friend of Muirhead, and Labour Secretary of State for Scotland during the 2nd World War Coalition government, stated that Roland Muirhead was 'the greatest patriot which Renfrewshire has produced since William Wallace'.[4]