As a BG customer I've had an offer to get this for £150. Not sure I will see the benefit though, pretty much always someone in the house???
I paid about that, in your spot I doubt you would save much, neither would anyone with a mostly regular routine. But deffo worth it for someone like me that comes and goes at irregular times. Also little things like my missus needs it warmer than me, when she goes to bed I drop the temp a couple of degrees, I could never be arsed doing that before but its so easy now I've started doing it.