Abstract: A demountable wall panelling system comprises a plurality of framework sections that can be placed along a line along which panelling is required and be engaged with one another for forming a structure on to which cladding panels can be releasably engaged. One or more framework sections includes at least one set of power supply points mounted thereon, the power supply points being electrically connected to connector pins secured to the framework section. The connector pins are disposed so that upon placement of the framework section, the pins are received in complementary socket formations secured to the floor region beneath the framework section, providing contact with electric power supplies for supplying power to the power supply points.