Question: What British Prime Minister committed the British Conservative Party to supporting Scottish devolution through the Declaration of Perth?
Sentence (from "Edward Heath"): Sir Edward Richard George Heath, (9 July 1916 – 17 July 2005), better known as Ted Heath, was a British politician who served as Prime Minister of the United Kingdom from 1970 to 1974 and Leader of the Conservative Party from 1965 to 1975.
Relevant evidence: Yes