The term 'Plan B' has become political shorthand for the notion that the UK Government's cuts programme should be replaced with an alternative that focuses more on growing the economy.
Plaid Cymru leader Leanne Wood thinks there's enough of a consensus amongst groups on the left of politics that they should form their own coalition to oppose that of the UK. But many of the organisations on the left have strong links to Labour - so how successful will she be?
Lynn Courtney has been finding out.
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