Does being in the EU mean lower retail prices?

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Listeners have a lot of questions about the European Union and the UK's referendum on whether to leave or remain. PM asked the BBC's Europe correspondent Chris Morris and Assistant Political Editor Norman Smith to answer a selection. Norman Smith answers Judi Best's question: A leaflet from the 'stronger in' campaign states that being in the EU means lower prices in the shops. Is this true? (Image: a shopper on London's Oxford Street. Credit: PA)