Thanks @yosarian / @w35l3y , I’d been trying to use the “Zigbee Switch Mc” from this channel, I’d rebooted the hub, switched the driver on the switch, rebooted hub again… but not removed and re-added the switch!
I think that’s done it, it’s now automatically picked up the “Zigbee Switch Mc” (Manufacturer: _TZ3000_9hpxg80k Model: TS0011) and has been on for over 2 minutes 
Need to go to bed (suddenly started obsessing about this this afternoon), will check again in the morning, thanks for the help!