"We want this to be a seamless process for our customers and they do not need to take any action, " said chief executive Gary Hoffman.

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While we do not have any immediate plans to take legal action against any specific employers , we look forward to engaging with policy makers and other stakeholders, to help better safeguard the privacy of our users.

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It also said that while it did not plan to do any more work on the national fuel market, it might still take action in some local markets if there was "persuasive evidence of anti-competitive behaviour".

BBC: OFT says UK petrol market is working well