Welcome

Logistics questions:
  Will the WG use Github and, if so, which style?
  Will the WG use Slack?
     If so, is this a side channel for developer discussion, or a broader channel?

Working group document questions:  

For the Use Case document, there is some adjustment to track to the charter--discussion on how to make progress there (a.k.a. collect contributors and reviewers)
  
Which technical questions do we want to tackle for the London meeting?
  
Who will be putting in personal drafts and on what topics?