A telecommunications system for providing mobile communications to mobile user equipment is provided which includes an internet protocol access network and a cellular mobile radio network. The internet protocol access network provides a facility for mobile communications to mobile user equipment within a coverage area for wireless communication provided by the internet protocol access network, the mobile communications being provided using an internet protocol. The cellular mobile radio network provides a facility for mobile communications to mobile user equipment within a coverage area for wireless communication provided by the cellular mobile radio network. The mobile communications are provided using at least one of a packet switched communications channel in which data is divided into packets and communicated on a communications bearer shared with other data packets, and a circuit switched communications channel in which data is communicated on a communications channel having a dedicated bandwidth. Mobile user equipment is provided and may activate a connection on the cellular mobile radio network using the packet switched communications channel whilst receiving a communications service via the internet protocol access network. The mobile user equipment communicates via the connection on the packet-switched channel of the cellular mobile radio network in response to a handover event for changing affiliation of the mobile user equipment fro m the internet protocol access network to the cellular mobile radio network. The mobile user equipment also establishes a connection on the cellular mobile radio network using the circuit switched channel in response to the handover event, continues to communicate via the connection on the packet-switched channel while the connection on the circuit-switched channel has been established, and then communicates via the connection on the circuit-switched channel once it has been established. In this way, improved continuity of service can be provided and the incidence of dropped calls can be reduced.