I’ve rebooted my router but.... My ADSL/DSL light isn't doing what it normally does (Inspire DSL)

Many routers will take a few minutes to connect, if the light is still not on after a few minutes it could indicate a problem with your line. You should try an ‘isolation test’ by unplugging every phone device (including Sky TV or similar) from the phone jacks and just having the router plugged in (make sure you reboot it again once it’s isolated).