A first electrical connector (1) for terminating an electrical cable (11) and for engaging with a mating electrical connector (51). The first connector comprises a body (5) having an engagement portion including a sleeve (7) whose passage extends along a mating axis (101) for engaging the mating electrical connector. The connector comprises at least one resilient member (15), such as a coil spring, arranged on the sleeve. The resilient member is capable of deforming radial to the mating axis (101) to provide a reaction force for maintaining the engagement of the connector with the mating connector. The first connector can be detached by lifting a boot (13) to pry apart the connectors.