A compliant foil radial bearing comprising: a bushing comprising a bore defined therethrough; a spring foil (120, 130) arranged to conform to a radially inner surface of the bore; a fluid foil (140, 150) arranged to conform to a radially inner surface of the spring foil (120, 130) for rotatably receiving a rotor, wherein: the radially inner surface of the bore comprises a plurality of axially oriented pads (115, 615) arranged around the circumference thereof, each pad (115, 615) comprising a radially inner surface arranged to support the spring foil, axial grooves being formed between adjacent pads; and wherein the spring foil (120, 130) comprises axially oriented loops arranged to fit within the axial grooves; and the radially inner surface of each pad (115, 615) supports the spring foil between circumferentially spaced axially oriented contact regions formed by contact between the radially inner surface and the spring foil (120, 130), such that circumferentially spaced axially oriented resilient strips disposed between loops support the fluid foil; and characterized in that: one or more of the axial grooves are provided with radially outer retaining socket regions for retaining one or more retaining members (170, 180), wherein the spring foil comprises two circumferential end regions between end loops and circumferential extremities, with one circumferential end region comprising a circumferential length greater than the other to provide a retaining portion arranged to wrap around one of the retaining members (170, 180). a bushing comprising a bore defined therethrough; a spring foil (120, 130) arranged to conform to a radially inner surface of the bore; a fluid foil (140, 150) arranged to conform to a radially inner surface of the spring foil (120, 130) for rotatably receiving a rotor, wherein: the radially inner surface of the bore comprises a plurality of axially oriented pads (115, 615) arranged around the circumference thereof, each pad (115, 615) comprising a radially inner surface arranged to support the spring foil, axial grooves being formed between adjacent pads; and wherein the spring foil (120, 130) comprises axially oriented loops arranged to fit within the axial grooves; and the radially inner surface of each pad (115, 615) supports the spring foil between circumferentially spaced axially oriented contact regions formed by contact between the radially inner surface and the spring foil (120, 130), such that circumferentially spaced axially oriented resilient strips disposed between loops support the fluid foil; and characterized in that: one or more of the axial grooves are provided with radially outer retaining socket regions for retaining one or more retaining members (170, 180), wherein the spring foil comprises two circumferential end regions between end loops and circumferential extremities, with one circumferential end region comprising a circumferential length greater than the other to provide a retaining portion arranged to wrap around one of the retaining members (170, 180). the radially inner surface of the bore comprises a plurality of axially oriented pads (115, 615) arranged around the circumference thereof, each pad (115, 615) comprising a radially inner surface arranged to support the spring foil, axial grooves being formed between adjacent pads; and wherein the spring foil (120, 130) comprises axially oriented loops arranged to fit within the axial grooves; and the radially inner surface of each pad (115, 615) supports the spring foil between circumferentially spaced axially oriented contact regions formed by contact between the radially inner surface and the spring foil (120, 130), such that circumferentially spaced axially oriented resilient strips disposed between loops support the fluid foil; and characterized in that: one or more of the axial grooves are provided with radially outer retaining socket regions for retaining one or more retaining members (170, 180), wherein the spring foil comprises two circumferential end regions between end loops and circumferential extremities, with one circumferential end region comprising a circumferential length greater than the other to provide a retaining portion arranged to wrap around one of the retaining members (170, 180).