 Which of these is not a barrier to the success of a complementary currency?
New money: Do local currencies actually work? It might never have occurred to many of us that there are other types of exchange that can stand in for ragged bank notes tucked away in pockets, or other objects that can stand in for those notes. In crisis-hit Greece, where the euro can be hard to come by, businesses and citizens have turned to bartering using a points system where goods like pianos, pot and pans can be exchanged for security services or loaned farming equipment. In India last year, desperate people burned sacks of illegal cash after the government withdrew two high-denomination notes as part of a crackdown on corruption. Timebanks, local exchange trading systems (LETS) and digital inventions like bitcoin can provide alternative ways for people to pay for goods and services when mainstream currencies hit crises. But they will only work if Britons are ready to accept that they have the power to invent their own currency. McCann is a long-time advocate of alternative means of exchange. It's an idea he no longer thinks will work, because the debate, since Brexit, has shifted from the currency issue back to ideas about Scottish independence. She runs the Clacks Youth Timebank, a scheme where 12- to 15-year-olds can earn credit for volunteering. "I don't see any reason why we shouldn't invent our own currency and play with it," she says. Everyone has gathered to decide what a Glasgow Pound might look like at a time when many are asking if local currencies can work at all.
 The lack of chain supermarkets in an area
 The income levels of the populations using the currency  The misinformation and confusion surrounding how banks and currencies work  The varying opinions about the best possible currency system for a group of people  The lack of chain supermarkets in an area