Hello dobfarm, Goughy, Bumblebee and All
Reading Morrell's 1867 History and Antiquities of Selby and found various early 19th Century references to religious dissent at Selby. It seems Selby had its dissenters, Methodism, Unitarians, etc.
A search indicated Hoods of Bardon Park were also dissenters.
https://en.m.wikipedia.org/wiki/Bardon_Park_ChapelAs you have said, this probably accounts for some marriages by Licence, with no baptism or burial in the Parish Register. Some changed denominations, as it suited them.
Some dissenters paid to be buried at Private Cemeteries elsewhere, which were springing up in the main Cities.
It was sometimes difficult to bury unbaptised children. A case in the 1870s shocked the country where the family were too poor to pay for the child to be transported and the higher burial fees elsewhere. The local graveyard relented and allocated a grave near the boundary wall. The paper says that two men lowered the coffin into the grave, but the Service had to be held the other side (outside) of the boundary wall.
Sounds like, us making a visit to Yorkshire, but a record may not survive.
Mark