Abstract: An elongate flexible track is flexibly positionable from an initial straight configuration to a non-straight configuration having a horizontal, vertical or compound curvature in which it is lockable with locking elements. The track has a plurality of stud receiving components each being formed with a horizontal base wall having a longitudinal edge and a transverse edge, a side wall on a first side of the track and a side wall on a second side of the track, the side walls extending vertically from respective longitudinal edges of the base wall. The base and side walls define a space in which a stud end of an elongate stud can be mounted. Adjacent stud receiving components are joined by linking elements which include pivot elements about which the linking elements are adjustable in one or more directions. At least one locking elements passage is provided on each side of the track.