Yes Paul,
It's actually an HPM branded socket-outlet.
There's really not a lot of difference in appearance between the brands.
The centre switch is totally independant of the sockets and can be used to control pretty much anything, as long as you stay within the current rating of the switch mechanism.
When doing a job like this, it's common here to use what we call an "engraved mechanism" to identify what type of circuit the switch controls.
Thus:

[Linked Image]