I found this on the fastnet maritime folk festival website and have highlighted some of the text in capitals, why the objection to it being referred to as a "shanty festival"

"2018
marks this festival’s 7th year running. Coordinator Dick Miles is pleased to welcome Martin Carthy back to the festival for the second time, along with old favourites such as Matt Cranitch and Jackie Daly, Steve Turner, Richard Grainger and many more. For the first time, we welcome Tom Lewis. SEA SONGS, SHANTIES, dance, craft market, artisan food and craft stalls, sea songwriting competition, music in the pubs and Ballydehob Community Hall. Most events are free except for headline concert.