OK so i did a bit more googling for UK Electrical symbols and it seems to work exactly as I suspected.
Here is the Wiring diagram from their documentation for the switch.
So here the Hot wire goes into the switch and then the switch feeds in the US what we call a Load Wire. That feeds your fixture/device/ect. That fixture/device/ect then has a connection to the Nuetral part of the circut to complete it. This means the switch has to allow some amount of power through the circut and to the end device to power itself. To get power to more then one switch with that one set of wires going into the box both wires woud need to be connected each switch. The more blead through that goes to the device the more likely you are to 1 cause damage to that device or just simply cuase unwante resultes with it working unexpected at a very low level even when all switches are off.
Atleast in the US this isn't generally a supported configuration. It will be interesting to see what the manufacture comes back with. I am not saying it couldn't possibly work, just not sure about how well it will
