Shirley Collins is my all-time favourite folksinger and inspiration. However, she didn't always sing in the style we know and love as authentically unaffected. Her earliest recordings were more Home Countyish. I think she discusses this somewhere, maybe in the booklet to her box set collection.

Like her, I think there is some scope for reverting to roots, even if this is a little more regional and countrified than the way we might speak in office meetings. I've also noticed quite a few people whose regional/country accents become stronger after a visit home and/or several pints, and this tendency can also come out when singing or reciting poetry, quite subconsciously.