Abstract: A system for evacuating an enclosure is provided. The system comprises first pumping means having an inlet selectively connectable to an outlet from the enclosure. Second pumping means are also provided together with conduit means for connecting an exhaust of the first pumping means to an inlet of the second pumping means. An auxiliary chamber is provided, this chamber being selectively connectable to the conduit means such that, in a first state, gas can be drawn from the auxiliary chamber by the second pumping means in isolation from the enclosure, and, in a second state, gas can be drawn from the enclosure to the auxiliary chamber through the first pumping means.

Abstract: A subscriber identity module for use in mobile communications networks, said subscriber identity module storing a list of preferred mobile communications networks, other than the home mobile network, to be selected for providing services, and said subscriber identity module being adapted to modify said list of preferred networks in response to location information.