A base station (5-1) configured to operate as part of a dual connectivity configuration in which a control-plane connection for a user communication device is provided via the base station (5-1) and at least one communication bearer between a core network and the user communication device is provided via at least a further base station (5-2), said base station (5-1) comprising: means for obtaining an aggregate maximum bit rate, AMBR, specific to said user communication device and for obtaining information relating to a data rate required for said user communication device via said further base station (5-2); means for generating information identifying a bit rate specific to said further base station (5-2), for use in enforcement of an aggregate maximum data throughput for said user communication device via said further base station (5-2), wherein said bit rate specific to said further base station (5-2) is generated based on: i) said AMBR specific to said user communication device ; and ii) said obtained information relating to a data rate required for said user communication device via said further base station (5-2); and means for providing, to said further base station (5-2), said information identifying said bit rate specific to said further base station (5-2); wherein said information relating to the data rate for said user communication device via said further base station (5-2) comprises at least one of: information of a data rate at said further base station (5-2) for said user communication device relative to an AMBR applicable at said further base station (5-2) for said user communication device , an indication of a data loss associated with said user communication device at said further base station (5-2), and information identifying a buffer status for said user communication device . means for obtaining an aggregate maximum bit rate, AMBR, specific to said user communication device and for obtaining information relating to a data rate required for said user communication device via said further base station (5-2); means for generating information identifying a bit rate specific to said further base station (5-2), for use in enforcement of an aggregate maximum data throughput for said user communication device via said further base station (5-2), wherein said bit rate specific to said further base station (5-2) is generated based on: i) said AMBR specific to said user communication device ; and ii) said obtained information relating to a data rate required for said user communication device via said further base station (5-2); and means for providing, to said further base station (5-2), said information identifying said bit rate specific to said further base station (5-2); wherein said information relating to the data rate for said user communication device via said further base station (5-2) comprises at least one of: information of a data rate at said further base station (5-2) for said user communication device relative to an AMBR applicable at said further base station (5-2) for said user communication device , an indication of a data loss associated with said user communication device at said further base station (5-2), and information identifying a buffer status for said user communication device . <EOS>