During the 1950s, Roberts was, together with Cledwyn Hughes and others, a stalwart of the Parliament for Wales campaign, and he presented the final petition to Parliament, bearing more than 250,000 signatures, in May 1956.
Roberts was with Cledwyn Hughes. This was during the 1950s. This was together. Roberts was with others. This was during the 1950s. This was together. Cledwyn Hughes were a stalwart of the Parliament for Wales campaign. Others were a stalwart of the Parliament for Wales campaign. He presented the final petition to Parliament. This was during the 1950s. He was bearing more than 250,000 signatures. This was in May 1956. This was during the 1950s.