A6. A major one is sustainability post-funding, when the project comes to an end but vols are still keen and engaged, and the need is still there, danger of leaving participants high & dry feeling abandoned #HeritageChat

A6. Also making sure it's genuine and not done cynically to take advantage of a funding opportunity or as an add on. Risk it's sometimes perceived as low-cost / easy - but it takes specific skills to do citizen science well and it's not a cheap option