The duty is very plain and simple.
There is a duty on every vicar, registrar, superintendent registrar, the registrar general or any other authorised person to supply a copy of an entry from any register in their possession where the entry has been identified and the fee paid.
There are no exceptions regarding postal applications, email applications, telephone applications or applications in person.
If the entry is identified and the fee paid the copy must be supplied.
Perhaps invoking the hard labour or the penal servitude, specified in the legislation, may illicit the required response.
Cheers
Guy