A method performed by a first network node operating in a wireless communication network, the method comprising: receiving a measurement report from a communication device being served by the first network node, the measurement report indicating signal measurements made by the communication device on non-beamformed downlink reference signals transmitted by a neighboring, second network node; deciding in dependence on the measurement report to evaluate the second network node as a handover target for serving the communication device and, in response: requesting the communication device to transmit uplink reference signals; requesting the second network node to make measurements on the uplink reference signals, the second network node being operative to transmit beamformed downlink reference signals for the communication device, using beamforming weights determined from the measurements made by the second network node on the uplink reference signals; receiving a further measurement report from the communication device, the further measurement report indicating signal measurements made by the communication device on the beamformed downlink reference signals transmitted by the second network node; and initiating (108, 109) handover of the communication device from the first network node to the second network node in dependence on evaluating the further measurement report. receiving a measurement report from a communication device being served by the first network node, the measurement report indicating signal measurements made by the communication device on non-beamformed downlink reference signals transmitted by a neighboring, second network node; deciding in dependence on the measurement report to evaluate the second network node as a handover target for serving the communication device and, in response: requesting the communication device to transmit uplink reference signals; requesting the second network node to make measurements on the uplink reference signals, the second network node being operative to transmit beamformed downlink reference signals for the communication device, using beamforming weights determined from the measurements made by the second network node on the uplink reference signals; receiving a further measurement report from the communication device, the further measurement report indicating signal measurements made by the communication device on the beamformed downlink reference signals transmitted by the second network node; and initiating (108, 109) handover of the communication device from the first network node to the second network node in dependence on evaluating the further measurement report. requesting the communication device to transmit uplink reference signals; requesting the second network node to make measurements on the uplink reference signals, the second network node being operative to transmit beamformed downlink reference signals for the communication device, using beamforming weights determined from the measurements made by the second network node on the uplink reference signals; receiving a further measurement report from the communication device, the further measurement report indicating signal measurements made by the communication device on the beamformed downlink reference signals transmitted by the second network node; and initiating (108, 109) handover of the communication device from the first network node to the second network node in dependence on evaluating the further measurement report.