It was a border marriage, no certificates, the marriage noted in a Berwick newspaper and also the Henry Collins registers. I don't know if those registers are available in Edinburgh or not but it would be just a ledger item without other information.
So no parental information but you take take comfort that they were married. They could have probably married in England no matter the religion or in a register office but I think at one time it was "exciting " to run off and get married. Folks in my area went to Winchester Virginia where there is no waiting period and 16 year olds can get married without parental permission.
Janis