They married in St Francis of Assisi in Holbeck. I've no idea why it shows as the Holbeck District Registered Building.
That would have been the format for a marriage performed in a non-Anglican church. A registrar had to be present for it to be recorded as a legal marriage. Without registrar's attendance it was a religious ceremony with no legal standing. I recall registrar seated at a little table in a corner of the church, within sight and sound of the altar, getting on with paperwork during the marriage service. There was nearly an hour to fill if it was Nuptial Mass. S/he paused during the legal sections of the ceremony to watch and listen, turning attention back to work during purely religious parts. They were, in a way, operating a mobile registry office.
Registrars had an employment dispute in late 20thC and, as part of their campaign, "worked-to- rule", refusing Saturday duty. This caused problems for couples who had weddings scheduled for Saturdays in Catholic and Non-Conformist churches where the minister wasn't licensed as a registrar. Solutions included a separate registry office ceremony on a weekday and registrar attending a wedding rehearsal.
The registrar should have signed Patrick's certificate as well as the priest. C. of E. marriage certificates don't have a registrar's signature.
Did Patrick sign the marriage certificate or make his mark?