I got this from the album "Murmurs" by Andy Cutting, Nancy Kerr and Martin Simpson. I think Andy Cutting wrote the waltz. The original arrangement on this recording is: A-B-A-B-C, then repeat.
Seven Years, X:2
I try to transcribe the version of Martin Simpson, Andy Cutting and Nancy Kerr from YouTube: https://www.youtube.com/watch?v=slxwVkBhfS4
The structure is: A, B, A, B, C and repeat as you want.
I hope you like it:
"A"B2 B3 A | Bd d2 GA | B2 B2 BA | Bd ed gf|
d2 B2 BA | B2 GA Bd | ed dB BG |1 A3 A GA:|2 A3 G AB ||
|:"B"c3 B cd | B2 AG AB | c3B cd | BG gf dB |
c2 cB cd | B2 AG AB | ed dB BG |1 A3 G AB :|2 "To A" A3 A GA||2 "To C" A4 ef ||
|:"C"gf ed (3Bcd | e2 ed GA | B2 BG cA | dB ec ef |
gf ed (3Bcd | e2 ed GA | B3A Bd |1 A3 e ef :|2 A4 GA|]