A base station for sharing resources of a communication bandwidth between a plurality of network operators including first and second network operators, the base station comprising: means for defining: (a) a first operator proportion of the resources in said communication bandwidth, which first operator proportion represents a target average minimum proportion of the resources to be prioritised for communication bearers of the first network operator, over time; (b) a second operator proportion of the resources in said communication bandwidth, which second operator proportion represents a target average minimum proportion of the resources to be prioritised for communication bearers of the second network operator, over time; and (c) a shared proportion of the resources in said communication bandwidth, which shared proportion represents a proportion of the resources to be shared between communication bearers of the first network operator and communication bearers of the second network operator; means for determining, in dependence on respective sizes of the first operator proportion, the second operator proportion and the shared proportion, for each of a sequence of sub-frames, whether the resources should be allocated: on a shared basis, in which resources are allocated without regard to any operator priority; or on a network operator based priority basis, in which resources are allocated based on an operator priority; and means for allocating, for each sub-frame, resources to the communication bearers of the network operators on said shared basis or said network operator based priority basis based on said determining by said determining means. means for defining: (a) a first operator proportion of the resources in said communication bandwidth, which first operator proportion represents a target average minimum proportion of the resources to be prioritised for communication bearers of the first network operator, over time; (b) a second operator proportion of the resources in said communication bandwidth, which second operator proportion represents a target average minimum proportion of the resources to be prioritised for communication bearers of the second network operator, over time; and (c) a shared proportion of the resources in said communication bandwidth, which shared proportion represents a proportion of the resources to be shared between communication bearers of the first network operator and communication bearers of the second network operator; (a) a first operator proportion of the resources in said communication bandwidth, which first operator proportion represents a target average minimum proportion of the resources to be prioritised for communication bearers of the first network operator, over time; (b) a second operator proportion of the resources in said communication bandwidth, which second operator proportion represents a target average minimum proportion of the resources to be prioritised for communication bearers of the second network operator, over time; and (c) a shared proportion of the resources in said communication bandwidth, which shared proportion represents a proportion of the resources to be shared between communication bearers of the first network operator and communication bearers of the second network operator; means for determining, in dependence on respective sizes of the first operator proportion, the second operator proportion and the shared proportion, for each of a sequence of sub-frames, whether the resources should be allocated: on a shared basis, in which resources are allocated without regard to any operator priority; or on a network operator based priority basis, in which resources are allocated based on an operator priority; and means for allocating, for each sub-frame, resources to the communication bearers of the network operators on said shared basis or said network operator based priority basis based on said determining by said determining means.