#1 It sticks to Brixton
Think of the Brixton as a leaky bucket. Money pours in, but there are large, corporate chain-shaped holes through which this money immediately leaks out.
A local currency reinforces shopping at independent businesses, which are more likely to source local supplies, use nearby services, and employ local people. Money that sticks to Brixton, and makes it a better place to live and shop.
Want more reasons? 11 more are right here.