I am sure it should, but I cannot see where the openenergymonitor/emonpi repository is refreshed on an update.
Can someone put me out of my misery please 
?
Yes that was the only place I could find it which struck me as odd and wondered if I was missing something.
[edit]
Got it. service-runner-update is not a script to update service-runner, but an update script triggered from service-runner 
Obvious really…