In one example embodiment, a method for selecting a physical layer identifier for use in a basestation is disclosed. The basestation may be comprised within a mobile communications network, which may also comprise a plurality of other basestations. The method comprises receiving a pool of identifiers available for use by basestations within the network and assigning a temporary identifier for the basestation. The method further comprises receiving from connected UEs reports of identifiers from among the received pool that are in use by basestations detected by the connected UEs and assigning a final identifier selected from the received pool of identifiers, the final identifier being different from the temporary identifier.