I suggest you write in the first instance to Dr Norman Doe, of the Institute for Religion and Law at Cardiff University. Norman may well have an LLM student whose dissertation study is in the historical jurisdiction of the Welsh diocesan courts who would like to know of this and to research it further; but even if he has not, he will I am sure be intrigued, and will point you in the right direction to investigate it further yourself.
This is an ecclesiastical case, rather than a civil one; and it is VERY late for the ecclesiastical jurisdiction for opprobrious words to be invoked. So something interesting is going on here.
I suspect that what has happened is that as there was no way of bringing home an action on the case for words in the civil courts for an allegation of being a whore, somebody had the bright idea of trying to invoke the ancient ecclesiastical jurisdiction instead. Such cases were ten a penny in the ecclesiastical courts in the 16th century: when I looked through the published records of the 16th century Norwich consistory court cases, I estimated that well in excess of 50% of all cases of intemperate words concerned calling somebody a whore, or variations thereon.
Alternatively, if you would like me to have a look at it (I am a canon lawyer myself, and graduated LLM in Canon Law in 1997) and can print off some hard copies I'll be happy to have a look at them for you. However, although Norman tried to persuade me to do my LLM dissertation on the historical jurisdiction of the church courts, I actually investigated something altogether different for my dissertation, so I probably will not have any answers for you. What I will have, however, is a pretty shrewd idea of what sort of questions to ask and of whom to ask them ... and I must confess to being more than a little intrigued.