A communications device (100, 200, 300, 400, 600, 800) providing variable ground plane tuning compensation, the communications device comprising: a radiofrequency antenna (108, 832) configured to generate an electromagnetic field; a ground plane assembly (202, 204; 302, 304; 402, 404; 602, 604) electrically coupled to the radiofrequency antenna (208, 308, 408, 601), the ground plane assembly being configurable between a first physical configuration and a second physical configuration, each of the physical configurations presenting a ground plane assembly impedance to the electromagnetic field of the radiofrequency antenna; and a variable impedance compensation network (210, 310, 410, 606) electrically connected to the ground plane assembly, the variable impedance compensation network providing a compensation impedance for each of the physical configurations of the ground plane assembly, the compensation impedance of the variable impedance compensation network and the ground plane assembly impedance of each of the physical configurations of the ground plane assembly combining to tune mutual electromagnetic coupling between the ground plane assembly and the radiofrequency antenna to satisfy a predetermined operational tuning condition for the communications device in each of the physical configurations, wherein the ground plane assembly includes a first ground plane component (202, 302, 402, 602) and a second ground plane component (204, 304 404, 604) characterised in that the satisfying the predetermined operational tuning condition includes tuning the compensation impedance based at least in part on an angle between the first ground plane component and the second ground plane component. a radiofrequency antenna (108, 832) configured to generate an electromagnetic field; a ground plane assembly (202, 204; 302, 304; 402, 404; 602, 604) electrically coupled to the radiofrequency antenna (208, 308, 408, 601), the ground plane assembly being configurable between a first physical configuration and a second physical configuration, each of the physical configurations presenting a ground plane assembly impedance to the electromagnetic field of the radiofrequency antenna; and a variable impedance compensation network (210, 310, 410, 606) electrically connected to the ground plane assembly, the variable impedance compensation network providing a compensation impedance for each of the physical configurations of the ground plane assembly, the compensation impedance of the variable impedance compensation network and the ground plane assembly impedance of each of the physical configurations of the ground plane assembly combining to tune mutual electromagnetic coupling between the ground plane assembly and the radiofrequency antenna to satisfy a predetermined operational tuning condition for the communications device in each of the physical configurations, wherein the ground plane assembly includes a first ground plane component (202, 302, 402, 602) and a second ground plane component (204, 304 404, 604) characterised in that the satisfying the predetermined operational tuning condition includes tuning the compensation impedance based at least in part on an angle between the first ground plane component and the second ground plane component.