I’ve started the process of getting the OSM UK community involved. I’ve chatted to lots of people about it, and then I posted an RFC on the talk-gb mailing list. Plenty of useful comments already.
People can join in voluntarily whenever they want. But there’s also the opportunity of having solar as the next “OSM UK Quarterly Project”, if the community collectively votes to do so. (They do this via a Loomio discussion group and vote.) The next one would be Jul-Sep (or the one after that Oct-Dec).
So this raises a timing question: is it likely we could get at least a first draft of a MapRoulette (or other) task set up with “solar panel locations in the UK suggested by DeepSolarOrSuchLike”, online by e.g. the end of May or mid-June?
If so, the community could well agree to use it for the quarterly. (If not, there’s an alternative arrangement: use the quarterly project to get lots of mapping done ad-hoc by the community, then use that as improved training data for ML, after which MapRoulette can run later.)