We are lucky to get liability insurance through in the end Devon CC, via Community Action Groups (CAG) Devon - this is used for all Devon’s Repair Cafes, and happily doesn’t come to us a cost. I’m sure there’s at least one topic on here about getting liability insurance. It’s one reason for working with a sustainibility or other charitable group because they may already have cover you can benefit from by joining/partnering with them?
See here Sign our letter to get a fairer deal from insurers - #5 by Luc_Deriez
Might be worth contacting @Repair_Cafe_Wales to see what happened from their letter?