The parishioners were waiting anxiously to know to whom the Archbishop was going to dedicate the Church. Having announced the name “St. Cadoc”, the Archbishop then spoke of the life of St. Cadoc and how he was a pioneer of Christianity in the Vale of Glamorgan. His Grace made the comparison with Fr. Magner who had become the first Parish Priest in Cowbridge and LLantwit Major since the Reformation. Following the service, there was a luncheon at Verlands, the Williams family home.
Initially the altar was positioned against the east end, when Mass was celebrated by the priest with his back to the people. A canopy was suspended over the altar and both altar and canopy were draped with burgundy red brocade hangings, brought back from Northern Ireland by Fr. Morris. After Vatican II, the high altar was removed and the altar table moved from the wall to the centre of the sanctuary. The tabernacle remained positioned on the east wall to the south of the altar.
The top of the canopy was only removed when the present renovation work started. The statues of the Sacred Heart (given by Mr. and Mrs. Muir) and Our Lady ( given by Mrs. Kathleen Hinde) remained on plinths facing the people each side of the sanctuary arch.
Meanwhile in Llantwit Major, a presbytery was built beside the church, and in 1962 Fr. Morris was succeeded by Fr. Driscoll. The town had been growing rapidly with the addition of many new housing estates, and by then there were too many Catholics living in the area to be accommodated in the small church.
In December 1963 Archbishop John Murphy was approached for permission and financial assistance to build a new church. He had already consented to the building of a new church at Rhoose, and work on that began in July 1964. In September of the same year, Rhoose was separated from Llantwit Major and Cowbridge, to become affiliated to the new Colcot parish, Barry.
That same month work started on the new church at Llantwit Major, which was completed by July 1965. The architect was the same Mr. T .G. Price of Bates, Son and Price of Newport who had designed Cowbridge church, but the builder was Mr. C. Williams of Newport. The design of the church was intended to take account of weather conditions, a low building being more feasible in view of the winter gales.
The main altar stone was taken from the ruined Ham House, so maintaining the link between the new church and Llantwit Major’s first post-Reformation Mass celebrated at “The Ham” by Fr. Turnbull some 44 years before.
In November 2007 the new Parish Centre was officially opened and blessed by Archbishop Peter Smith. The Parish Ladies Guild funded all the kitchen equipment and blinds for the windows. The Parish Centre was used for children’s catechesis and Parish social and fundraising events. In 2011, once again the Ladies Guild, funded a projector for Parish use. At the end of 2015, thanks to a Legacy of £40,000 and the hard-work and generosity of the Parish Family, the repayments to the Archdiocesan deposit account were achieved and the loan for building the Parish centre was completed.