The slogan, 'Change that works for you. Building a fairer Britain', is being used for the first time at the party's Spring Conference in Birmingham this week. It combines the lines being used by Labour, "A future fair for all" and the Conservatives' "Vote for change".
The slogan has been devised in an effort by the Lib Dems to persuade the public it is the only party that can deliver on both promises.
Lib Dem MP Danny Alexander said: "This election will be about fairness and change, and the Liberal Democrats is the only party that will deliver both."
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