If you go for the first option, as David Gray did at the Royal Albert Hall last night, the new material had better be good. As it is, Mutineers, the singer’s first new record in four years, is a mixed bag. So for every As The Crow Flies, a harmony-filled hymnal of spellbinding beauty, there was a Gulls, another song to add to the 46-year-old’s mounting post-White Ladder pile of maudlin piano ballads.