On her 2002 album ‘Back To the Hills’, Kathryn Tickell plays this with Willie Taylor. She calls it "a family favourite" and it’s certainly from the Northumbrian folk tradition.
I think is a Willie Taylor composition, interpreted here on guitar by Martin Simpson:
Lad With The Pladdie: http://tunearch.org/wiki/Annotation:Laddie_with_the_Pladdie_(The) This was printed in Kerr’s Vol 1, published in the 1880s, so predates Willie and is just as likely to be Scottish, or perhaps more likely so, given the title.
Kielder Schottische again
This is on the old, sorry, auld Bonny North Tyne or Ho’ly Ha’Penny LPs, forget which. Billy Ballantine, George Armstrong I think? Wonderful…auld records.
The usual tune which goes by the name "Kielder Schottische" is in fact a version of the tune known in Scotland as "The Lad wi the Pladdie" - and that’s the tune on Kathryn Tickell’s ‘Back to the Hills’ album. However, that’s not the tune given here. I don’t recognise the tune which Joe Heckels has given us.