Sorry, John, I have no idea what years are covered by the register I was looking at. I simply find which microfilm covers the event and year I'm looking for, whizz through till I find it, then put it back in the draw! I could try to find out. To my knowledge there are no original Northumberland parish records online though some of the Bishop's transcripts are available - sadly not Ellingham.
As for transcripts - the guys on here have said that this record is available on find my past (though not in full) and also on freereg where it is complete.
Christine