There is disclosed herein a heat exchanger (10) and an associated method of manufacture. The heat exchanger (10) comprises a flow conduit (14) for accommodating flow of a heat transfer fluid. The conduit is wound around a central axis (12) so as to form a plurality of turns, for example in a helical fashion. A support member (18) for the conduit (14) is formed of a sheet material shaped to extend in a circumferential direction about the central axis (12), wherein the support member is common to said plurality of turns. A plurality of fasteners (20) are arranged to attach the conduit (14) to the support member at spaced locations along its length.