This early pinnacle in Boyce's career coincided with the dominance of the Welsh rugby team in the Five Nations Championship during the 1970s. His songs and poems were real-time reflections on this unfolding history, often invoking the names of Welsh rugby greats such as Barry John, Gareth Edwards and Dai Morris. Songs such as "Hymns and Arias" soon became popular with rugby crowds, a fact which has played a significant part in his ongoing popularity. When Swansea City were promoted to the English Premier League in 2011, Boyce was asked to perform for their first game and produced a special version of "Hymns and Arias" for the occasion.