Over the last 18 months a new wave of young trendy jazz musicians has been sweeping the UK. The leaders of this new group are rapidly turning into a new Jazz Rat Pack - winning awards, selling out concerts, crossing over into national newspapers, national TV and Radio and international sales. Singers Jamie Cullum and Clare Teal are the most high profile, while Dennis Rollins, Dylan Howe, Ben Castle, Soweto Kinch and others are all challenging the conventional underground jazz business, breaking …