There appeared to be a problem with loading the slideset, so I went to Plan B. I was just about to do a big data talk with no slides. That is the first learning: always have a Plan B and be ready to improvise. This being Oxford, I thought they could access the slides off the Internet. But then the technical problem was solved and I gave a conventional talk.
The key lessons are on taking research to policy; solving the human resource problem; and solving the data access problem.
The slides are here.