It’s almost a little too warm this evening in the Duncairn Centre’s beautiful theatre space. It’s also possible everyone is a little hot under the collar from rushing to the venue, some seasonal marching to the north of Belfast has made getting here on time a challenging proposition and people are still arriving as our host welcomes the crowd and introduces the evening’s support, Nathan O’Regan. Once the Cork-born singer-songwriter takes to the stage it becomes clear his songs are a lesson in measured restraint; it’s obvious he could push his voice harder, that he is more than capable of…