A method for an apparatus connecting a trusted wireless local area network, WLAN, access network, TWAN, to a core network of a wireless communications network, the apparatus acting as a common control gateway and user gateway for the TWAN and a cellular access network, the method comprising: receiving from the core network of the wireless communications network, control plane signalling from a mobility management entity, MME, of the core network via a control plane interface between the apparatus and the MME,_and user plane signalling from a serving gateway, SGW, of the core network via a user plane interface between the apparatus and the SGW, the control plane signalling and user plane signalling associated with a user equipment, UE, when the user equipment is in a cell controlled by the cellular access network, the user equipment having an existing communication connection with a packet data network, receiving a measurement report, the measurement report transmitted in the cell by the user equipment and comprising inter-system measurements associated with one or more wireless local area networks whose received signal strength indicator, RSSI, exceeds a threshold, based on the measurement report, determining to perform a handover of the user equipment to a wireless local area network associated with the TWAN, transmitting a handover request to the TWAN via an interface between the apparatus and the TWAN supporting both user plane and control plane communication, the handover request comprising one or more of an address associated with the apparatus, a tunnel endpoint identifier, TEID, associated with the apparatus, a packet gateway, P-GW, identity ID, and an access point name, APN, receiving a response to the handover request from the TWAN via the interface between the apparatus and the TWAN which supports both user plane and control plane communication, the response comprising one or more of a status of the handover, an address associated with the wireless local area network and a TEID associated with the wireless local area network, generating a handover command message for transmission to the user equipment instructing the user equipment to perform the handover to the wireless local area network, receiving from the TWAN an indication that the handover has been completed via the interface between the apparatus and the TWAN which supports both user plane and control plane communications, transmitting to the core network an indication of the completion of the handover of the user equipment from the cell to the wireless local area network via the control plane interface between the apparatus and the MME, and receiving, from the core network, control plane signalling from the MME via the control plane interface between the apparatus and the MME, and user plane signalling from the SGW via the user plane interface between the apparatus and the SGW, associated with the user equipment when the user equipment is in the wireless local area network. receiving from the core network of the wireless communications network, control plane signalling from a mobility management entity, MME, of the core network via a control plane interface between the apparatus and the MME,_and user plane signalling from a serving gateway, SGW, of the core network via a user plane interface between the apparatus and the SGW, the control plane signalling and user plane signalling associated with a user equipment, UE, when the user equipment is in a cell controlled by the cellular access network, the user equipment having an existing communication connection with a packet data network, receiving a measurement report, the measurement report transmitted in the cell by the user equipment and comprising inter-system measurements associated with one or more wireless local area networks whose received signal strength indicator, RSSI, exceeds a threshold, based on the measurement report, determining to perform a handover of the user equipment to a wireless local area network associated with the TWAN, transmitting a handover request to the TWAN via an interface between the apparatus and the TWAN supporting both user plane and control plane communication, the handover request comprising one or more of an address associated with the apparatus, a tunnel endpoint identifier, TEID, associated with the apparatus, a packet gateway, P-GW, identity ID, and an access point name, APN, receiving a response to the handover request from the TWAN via the interface between the apparatus and the TWAN which supports both user plane and control plane communication, the response comprising one or more of a status of the handover, an address associated with the wireless local area network and a TEID associated with the wireless local area network, generating a handover command message for transmission to the user equipment instructing the user equipment to perform the handover to the wireless local area network, receiving from the TWAN an indication that the handover has been completed via the interface between the apparatus and the TWAN which supports both user plane and control plane communications, transmitting to the core network an indication of the completion of the handover of the user equipment from the cell to the wireless local area network via the control plane interface between the apparatus and the MME, and receiving, from the core network, control plane signalling from the MME via the control plane interface between the apparatus and the MME, and user plane signalling from the SGW via the user plane interface between the apparatus and the SGW, associated with the user equipment when the user equipment is in the wireless local area network.