Abstract: A flooring system comprising a plurality of elongate members (1) secured together along adjacent longitudinal side edges by means of co-operating male and female formations (2, 3). The female formation (3) is a channel with relatively convergent sidewalls and the male formation comprises a hollow rail of complementary shape. An outer sidewall of the channel is resilient to allow the rail to be snapped into the channel in a direction transverse to the length of the members (1) and to return to its original shape to resist removal of the rail. The formations (2, 3) are arranged so that upper surfaces of adjacent members (1) form a panel having a planar support surface (21) and relative rotation of the members (1) about an axis parallel to the longitudinal side edges is resisted. Two panels may be joined together to provide upper and lower planar support surfaces (21, 22).