In a petition for conservation works to two fine Victorian stained glass windows, a dispute about the identity of the appropriate contractor arose between the parish, on the one hand, and the Diocesan Advisory Committee (DAC) and the Church Buildings Council (CBC), on the other. The DAC and CBC advised that the contractor should be registered as accredited on the Institute of Conservation list. The parish provided a reference for their preferred contractor, who was not registered on that list. The reference from a respected cathedral architect evidenced several years of relevant experience and high-quality work. The deputy chancellor acknowledged the concern that contractors should be properly accredited, but considered that that did not require the blanket application of a requirement for accreditation. In the particular circumstances of this case the petitioners had provided sufficient evidence that their preferred contractor had the requisite skill and experience for the works. The faculty was granted on condition that the works should be undertaken by the parish's preferred contractor. [RA]