Worldpay and Vantiv have been handed an extra week to agree £7.7bn takeover

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The firms have more time to hash out a deal (Source: Getty)

The deadline in a takeover bid for FTSE 100 payments firm Worldpay by the US's Vantiv has been extended.

A "put up or shut up" deadline where a firm offer had to be made or it walked away under UK rules expired today. But authorities have given the firms more time to hash out details of the £7.7bn bid.

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"Positive discussions are continuing between Worldpay and Vantiv, but there can be no certainty that a firm offer will be forthcoming," Worldpay said in a regulatory update.

The firms have been handed an additional week.

According to recent reports, the two are in discussions over locating the merged company's international headquarters and about a potential secondary listing on the London Stock Exchange.