I couldn’t make the universal clipboard work, so here’s how:

  1. Check the article here: http://www.macrumors.com/2016/09/20/macos-sierra-universal-clipboard/
  2. Turn on ‘handoff’ on your iOS device (search for it in settings)
  3. In summary
    1. Both devices must be on the same Wifi network (I think)
    2. Both devices must have Bluetooth switched on
    3. Both devices must new enough (see article above)
    4. The devices have to be physically near each other so that Bluetooth can make contact
  4. Mine didn’t work until I switched on Handoff, and now it does.
  5. How often will I use this? Time will tell.