For our second preview of the Edinburgh Fringe, Ewan Spence talks to Darrell Martin, owner of the Just The Tonic venues. We talk about starting out at the Edinburgh Fringe with the Big Value Comedy Showcase before moving into venue management; the mix of ticketing at the Fringe (from Free to full price) and which Darrell thinks is best; the cost of attending the Fringe; and finally touch on the impact of politicial decision in Edinburgh and Scotland threaten the Festival.