Wallmark are glum and they want you to know about it. They also want you to know they are fans of the music of Damien Rice and David Gray. If ‘Behind These Lines’ has a problem it is that it wears its influences too proudly. There is an endearing and bittersweet ballad in here somewhere but Wallmark cleave too tightly to the tenets of singer-songwriter convention. Guys! Throw that rulebook away.