The 17th iteration of a roots and acoustic music festival is set to be the most successful yet — with more than 5,000 visitors expected. This year’s Gate To Southwell Festival (GTSF), which takes place from Thursday, July 4, to Sunday, July 7, at the festival site in nearby Kirklington, boasts over 60 international artists performing across four stages. The four-day festival of music and dance will continue to build on the critical and commercial successes of recent years, according to GTSF director Mike Kirrage. “Since the move to our beautiful lakeside setting at Kirklington the audience res…