Bob Blake sang unaccompanied,and stylistically was not different from his contemporary Sussex traditional singers.
I take BrianPeters,and guest Wendys comments on board,and to some extent agree with them[reKate Rusby],but Bob Blake is an example of a grey areas,that to me exposes the unsatisfactory nature of the label traditional singer.
Kate Rusby,Does bring young people into traditional music, a small percentage of whom ,go on to discover source singers,as some of the people did, who were introduced by Fairport.
In Ireland Comhaltas [amongst others] does this.