The number of towns in Britain with their own currency doubled this week.
Lewes in Sussex and Totnes in Devon have had their own currency for more than a year.
Last week they were joined by the Stroud in Gloucestershire and on Thursday the latest arrival was launched in the inner London Borough of Brixton.
The pound notes can only be used in local shops which have signed up to the scheme. But do they really keep money in their own community?
Bob Howard reports from Lewes.
This item was first broadcast on Radio 4's Money Box on Saturday, 19 September 2009.