A wireless access point may be in the form of a femtocell basestation in a cellular network. In order to establish a connection into the cellular network, an identity token is required for authorisation. A remote service, accessible over a Wide Area Network such as the interne, can register with the access point. When a connected user attempts to connect to the remote service, information derived from the identity token is inserted into the data traffic. Where the identity token identifies the access point, the remote service can return location-specific information. Where the identity token identifies the connected user, the remote service can return subscriber-specific information. The access point can insert information derived directly from the identity token, or it can use the identity token to access a service identity registry, and can then insert the service identity into the data traffic.