OK

UK mudcatter who organises a concert style club in Lincolnshire?
That wonderful man called The Villan LOL

UK mudcatter who is Greek from St Albans area?
El Greko

UK mudcatter from the depths of darkest Scotland?
Whats is name Giok :-)

UK Mr and Mrs on mudcat who organise 'singarounds and Folk Festival?
Mr And Mrs Sooz

UK Man and wife who don't perform but travel to see live Folk music?
Travelling Audience

UK performer who "Drowned her in the bath cos he's a psychopath"
Big Al Whittle