I interviewed local singer Chad for my radio folk show in 2020.As a student and young teacher he spent time in Winterton - and sang in The Fisherman's Return where SL sang. Met Sam Larner when Sam was well into his 80s and was invited round to his cottage. The interview (3/4 mins long) contains a description of meeting Sam and his wife, Dorcas.
If you can let me have your email address - can send an mp3 copy of the interview - and could put you in touch with Chad.
Hope you will find this helpful.
Ken.