A dispenser for dispensing sheet material comprising: a housing, a replaceable cartridge comprising a roll of the sheet material to be dispensed wound about an elongate core, the cartridge including an end plug at an end of the core, the housing supporting the cartridge in a dispensing position, the cartridge being insertable into said housing to assume said dispensing position and removable therefrom for replacement, the housing carrying journaling surfaces to engage journaled surfaces on the cartridge when the cartridge is in a coupled orientation to journal the core to the housing for rotation about an axis, the housing including a catch member, characterized by: the end plug including an engagement mechanism including a resilient member disposed about the axis to engage the catch member and releasably couple the cartridge to the housing in the coupled orientation, the resilient member extending radially outwardly from the cartridge in an unbiased inherent configuration, the resilient member being resiliently deflectable radially from the inherent configuration to deflected configurations of different radial extents than the inherent configuration and biased to return to the inherent configuration when deflected from the inherent configuration, the catch member having a central cavity formed therein coaxially about the axis, wherein in the coupled orientation, the end plug is located coaxially within the cavity, the catch member including a radial exitway extending radially from the cavity for passage of the engagement mechanism in moving from the coupled orientation to a radial uncoupled orientation, the exitway having a circumferential extent relative the axis which permits movement of the engagement mechanism radially relative the catch member through the exitway when the resilient member is in one of the deflected configurations yet preventing movement of the engagement mechanism radially relative the catch member through the exitway when the resilient member is in the inherent configuration, wherein from the coupled orientation on moving the cartridge radially relative the catch member engagement between the catch member and the resilient member deflects the resilient member radially from the inherent configuration to one of the deflected configurations permitting the resilient member to move radially through the exitway of the catch member from the coupled orientation to the radial uncoupled orientation. a housing, a replaceable cartridge comprising a roll of the sheet material to be dispensed wound about an elongate core, the cartridge including an end plug at an end of the core, the housing supporting the cartridge in a dispensing position, the cartridge being insertable into said housing to assume said dispensing position and removable therefrom for replacement, the housing carrying journaling surfaces to engage journaled surfaces on the cartridge when the cartridge is in a coupled orientation to journal the core to the housing for rotation about an axis, the housing including a catch member, the end plug including an engagement mechanism including a resilient member disposed about the axis to engage the catch member and releasably couple the cartridge to the housing in the coupled orientation, the resilient member extending radially outwardly from the cartridge in an unbiased inherent configuration, the resilient member being resiliently deflectable radially from the inherent configuration to deflected configurations of different radial extents than the inherent configuration and biased to return to the inherent configuration when deflected from the inherent configuration, the catch member having a central cavity formed therein coaxially about the axis, wherein in the coupled orientation, the end plug is located coaxially within the cavity, the catch member including a radial exitway extending radially from the cavity for passage of the engagement mechanism in moving from the coupled orientation to a radial uncoupled orientation, the exitway having a circumferential extent relative the axis which permits movement of the engagement mechanism radially relative the catch member through the exitway when the resilient member is in one of the deflected configurations yet preventing movement of the engagement mechanism radially relative the catch member through the exitway when the resilient member is in the inherent configuration, wherein from the coupled orientation on moving the cartridge radially relative the catch member engagement between the catch member and the resilient member deflects the resilient member radially from the inherent configuration to one of the deflected configurations permitting the resilient member to move radially through the exitway of the catch member from the coupled orientation to the radial uncoupled orientation.